$48+ Cheap flights from Las Vegas (LAS) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ORD
Jul 23 — Jul 301
Round-trip
1 adult, Economy
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Find cheap flights from Las Vegas to Illinois with Cheapflights
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Cheapest flights from Las Vegas to IllinoisExplore the most affordable flight options available from Las Vegas to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.
Explore the most affordable flight options available from Las Vegas to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.
This CheapOair deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Sun 8/301:06 pm
MLI
- LAS
Nonstop3h 25m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$101
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1612:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Mon 7/208:08 pm
STL
- LAS
1 stop5h 21m
Frontier
Deal found 6/21![Frontier logo]()
$209
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Sat 7/257:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:40 am
LAS
- STL
1 stop8h 57m
Frontier
Tue 8/186:45 pm
STL
- LAS
Nonstop3h 35m
Frontier
Deal found 6/23![Frontier logo]()
$212
This CheapOair deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Thu 7/2312:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:34 pm
LAS
- STL
1 stop22h 49m
Frontier
Wed 7/297:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
LAS
- STL
1 stop6h 56m
Frontier
Wed 8/196:45 pm
STL
- LAS
Nonstop3h 35m
Frontier
Deal found 6/21![Frontier logo]()
$214
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:50 pm
LAS
- STL
1 stop7h 07m
Frontier
Tue 8/188:00 am
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$215
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:20 am
LAS
- STL
1 stop8h 24m
Delta
Sun 8/166:20 am
STL
- LAS
1 stop6h 13m
Delta
Deal found 6/23![Delta logo]()
$217
This Travelocity deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:18 pm
LAS
- STL
Nonstop3h 21m
Frontier
Mon 11/95:32 pm
STL
- LAS
Nonstop3h 43m
Frontier
Deal found 6/18![Frontier logo]()
$218
This CheapOair deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/132:53 pm
LAS
- STL
1 stop26h 30m
Frontier
Sun 8/167:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/20![Frontier logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/129:48 pm
LAS
- STL
2 stops15h 08m
Frontier
Thu 8/206:45 pm
STL
- LAS
Nonstop3h 35m
Frontier
Deal found 6/21![Frontier logo]()
$221
Best flights from Las Vegas to IllinoisDiscover carefully curated flight deals from Las Vegas to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 23, 2026.
Discover carefully curated flight deals from Las Vegas to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 23, 2026.
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:02 pm
LAS
- STL
1 stop5h 39m
Delta
Wed 8/198:00 am
STL
- LAS
1 stop6h 06m
Delta
Deal found 6/19![Delta logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Thu 7/2312:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Deal found 6/18![Allegiant Air logo]()
$239
This Alaska Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:51 pm
LAS
- ORD
1 stop7h 08m
Alaska Airlines
Mon 8/316:01 am
ORD
- LAS
1 stop8h 03m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:10 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Sun 8/99:21 am
RFD
- LAS
1 stop10h 19m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$273
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:40 pm
LAS
- ORD
Nonstop3h 52m
United Airlines
Tue 9/84:45 pm
ORD
- LAS
Nonstop4h 09m
United Airlines
Deal found 6/19![United Airlines logo]()
$275
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/169:30 am
LAS
- MDW
Nonstop3h 35m
Southwest
Sat 9/192:40 pm
MDW
- LAS
Nonstop3h 50m
Southwest
Deal found 6/21![Southwest logo]()
$275
This American Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:59 am
LAS
- MLI
1 stop7h 40m
American Airlines
Sat 7/114:44 pm
MLI
- LAS
1 stop9h 04m
American Airlines
Deal found 6/19![American Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:02 pm
LAS
- STL
1 stop5h 39m
Delta
Sun 8/166:20 am
STL
- LAS
1 stop8h 18m
Delta
Deal found 6/22![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:02 pm
LAS
- STL
1 stop5h 39m
Delta
Sun 8/308:48 am
STL
- LAS
1 stop5h 50m
Delta
Deal found 6/22![Delta logo]()
$217
This Mytrip deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:00 am
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Sun 7/261:14 pm
RFD
- LAS
Nonstop3h 39m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$240
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/275:00 pm
LAS
- STL
1 stop5h 41m
Delta
Fri 7/317:55 pm
STL
- LAS
1 stop5h 45m
Delta
Deal found 6/22![Delta logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2211:11 am
LAS
- ORD
1 stop10h 25m
Alaska Airlines
Tue 8/117:59 pm
ORD
- LAS
1 stop16h 32m
Alaska Airlines
Deal found 6/21![Alaska Airlines logo]()
$263
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1711:30 pm
LAS
- STL
1 stop7h 09m
United Airlines
Sun 7/195:10 am
STL
- LAS
1 stop5h 57m
United Airlines
Deal found 6/23![United Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:41 pm
LAS
- RFD
1 stop18h 25m
Multiple Airlines
Sun 8/239:35 pm
RFD
- LAS
Nonstop3h 46m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$284
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:55 pm
LAS
- MDW
Nonstop3h 30m
Southwest
Tue 9/811:30 am
MDW
- LAS
Nonstop3h 45m
Southwest
Deal found 6/21![Southwest logo]()
$285
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:19 am
LAS
- STL
1 stop8h 27m
Delta
Mon 7/276:21 am
STL
- LAS
1 stop8h 05m
Delta
Deal found 6/20![Delta logo]()
$217
This Super.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Sun 7/1212:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$266
This Alaska Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:50 am
LAS
- ORD
1 stop10h 07m
Alaska Airlines
Fri 8/142:20 pm
ORD
- LAS
1 stop9h 23m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$271
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2112:20 am
LAS
- MDW
Nonstop3h 20m
Southwest
Mon 8/2410:05 am
MDW
- LAS
1 stop5h 05m
Southwest
Deal found 6/22![Southwest logo]()
$291
This American Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:02 am
LAS
- BMI
1 stop8h 54m
American Airlines
Tue 8/44:30 pm
BMI
- LAS
1 stop7h 15m
American Airlines
Deal found 6/23![American Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:10 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Fri 8/146:26 pm
RFD
- LAS
1 stop19h 38m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:45 am
LAS
- STL
1 stop8h 19m
United Airlines
Sat 8/151:36 pm
STL
- LAS
2 stops8h 28m
United Airlines
Deal found 6/19![United Airlines logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:00 am
LAS
- ORD
1 stop10h 21m
Alaska Airlines
Wed 8/266:01 am
ORD
- LAS
1 stop8h 03m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/275:20 pm
LAS
- STL
1 stop5h 20m
Southwest
Fri 7/319:55 pm
STL
- LAS
Nonstop3h 30m
Southwest
Deal found 6/18![Southwest logo]()
$299
This American Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1711:49 pm
LAS
- PIA
1 stop7h 28m
American Airlines
Mon 7/206:58 pm
PIA
- LAS
1 stop6h 55m
American Airlines
Deal found 6/19![American Airlines logo]()
$329
This CheapOair deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:10 am
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Thu 8/279:35 pm
RFD
- LAS
Nonstop3h 46m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$300
This Alaska Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:51 pm
LAS
- ORD
1 stop7h 08m
Alaska Airlines
Sun 8/306:01 am
ORD
- LAS
1 stop8h 03m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Sun 7/269:19 am
RFD
- LAS
1 stop10h 21m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/224:30 pm
LAS
- MDW
1 stop5h 40m
Southwest
Sun 7/2610:25 pm
MDW
- LAS
Nonstop3h 55m
Southwest
Deal found 6/22![Southwest logo]()
$303
This CheapOair deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/127:00 am
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Sun 8/309:35 pm
RFD
- LAS
Nonstop3h 46m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$304
Last-minute flights from Las Vegas to IllinoisDiscover last-minute flight deals from Las Vegas to Illinois. Data last updated June 23, 2026 and is based on user searches.
Discover last-minute flight deals from Las Vegas to Illinois. Data last updated June 23, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Thu 7/2312:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1011:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Tue 7/217:15 am
ORD
- LAS
Nonstop4h 08m
Frontier
Deal found 6/23![Frontier logo]()
$238
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Sat 7/257:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1312:27 pm
LAS
- STL
1 stop9h 32m
Frontier
Wed 7/297:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$215
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:25 pm
LAS
- STL
1 stop5h 32m
United Airlines
Sat 7/187:23 pm
STL
- LAS
1 stop7h 23m
United Airlines
Deal found 6/18![United Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:34 pm
LAS
- STL
2 stops12h 23m
Frontier
Sat 7/257:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$234
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1612:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Mon 7/208:08 pm
STL
- LAS
1 stop5h 21m
Frontier
Deal found 6/21![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:34 pm
LAS
- STL
1 stop22h 49m
Frontier
Tue 7/287:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$213
This Trip.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1812:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/19![Frontier logo]()
$230
This Cheapflightsfares deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1811:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Fri 7/247:15 am
ORD
- LAS
Nonstop4h 08m
Frontier
Deal found 6/22![Frontier logo]()
$237
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2011:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Tue 7/287:15 am
ORD
- LAS
Nonstop4h 08m
Frontier
Deal found 6/21![Frontier logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:50 pm
LAS
- STL
2 stops22h 33m
Frontier
Sun 7/267:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$231
One-way flights from Las Vegas to IllinoisSearch for one-way flight options from Las Vegas to Illinois. Find affordable one-way fares based on user searches. Data last updated June 23, 2026.
Search for one-way flight options from Las Vegas to Illinois. Find affordable one-way fares based on user searches. Data last updated June 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/19![Frontier logo]()
$48
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1512:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$49
This Kiwi.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1612:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/22![Frontier logo]()
$50
This Super.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/22![Frontier logo]()
$54
This Cheapflightsfares deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$55
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:25 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/19![Frontier logo]()
$56
This Cheapflightsfares deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/19![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:25 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/22![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 6/22![Allegiant Air logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:05 am
LAS
- MLI
Nonstop3h 10m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/712:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/19![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:57 pm
LAS
- STL
Nonstop3h 20m
Frontier
Deal found 6/19![Frontier logo]()
$93
Find flight deals from Las Vegas to Illinois
Keep the following information in mind while searching for Las Vegas to Illinois flight deals. Data was last updated June 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $101 (CheapOair) |
One-way from | $48 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $349 |
Good round-trip deal | $206 or less |
Good one-way deal | $131 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Las Vegas to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2026.
Use the filters below to find and compare flights from Las Vegas to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Mon 8/17
5:02 pm-12:41 am
1 stop5h 39m
Lambert-St Louis
Wed 8/19
8:00 am-12:06 pm
1 stop6h 06m
$217
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Thu 8/13
5:02 pm-12:41 am
1 stop5h 39m
Lambert-St Louis
Sun 8/16
6:20 am-12:38 pm
1 stop8h 18m
$217
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Fri 8/28
5:02 pm-12:41 am
1 stop5h 39m
Lambert-St Louis
Sun 8/30
8:48 am-12:38 pm
1 stop5h 50m
$217
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Mon 7/27
5:00 pm-12:41 am
1 stop5h 41m
Lambert-St Louis
Fri 7/31
7:55 pm-11:40 pm
1 stop5h 45m
$217
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Thu 7/23
6:19 am-4:46 pm
1 stop8h 27m
Lambert-St Louis
Mon 7/27
6:21 am-12:26 pm
1 stop8h 05m
$217
Quickest round-trip
Las VegasMoline
LAS - MLI
LASMLI
Las Vegas Harry Reid Intl
Sun 7/5
6:25 am-11:41 am
Nonstop3h 16m
Moline Quad-City
Thu 7/23
12:31 pm-1:58 pm
Nonstop3h 27m
$239
Las VegasChicago
LAS - RFD
LASRFD
Las Vegas Harry Reid Intl
Sun 7/19
7:00 am-12:24 pm
Nonstop3h 24m
Chicago Greater Rockford
Sun 7/26
1:14 pm-2:53 pm
Nonstop3h 39m
$240
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Thu 8/20
2:51 pm-11:59 pm
1 stop7h 08m
Chicago O'Hare Intl
Mon 8/31
6:01 am-12:04 pm
1 stop8h 03m
$255
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 7/22
11:11 am-11:36 pm
1 stop10h 25m
Chicago O'Hare Intl
Tue 8/11
7:59 pm-10:31 am
1 stop16h 32m
$263
Las VegasMoline
LAS - MLI
LASMLI
Las Vegas Harry Reid Intl
Thu 7/9
6:25 am-11:41 am
Nonstop3h 16m
Moline Quad-City
Sun 7/12
12:31 pm-1:58 pm
Nonstop3h 27m
$266
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Las Vegas to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Las Vegas with our price prediction graph.
LAS-STL
LAS-MLI
LAS-ORD
LAS-RFD
LAS-MDW
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Las Vegas to Illinois
LAS-USIL
LAS-STL
LAS-MLI
LAS-ORD
LAS-RFD
What is the cheapest month to book a flight from Las Vegas to Illinois?
Currently, January is the cheapest month in which you can book a flight from Las Vegas to Illinois (average of $29). Flying from Las Vegas to Illinois in July is currently the most expensive (average of $96). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LAS to IL?
Find hourly flight availability from Las Vegas to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 23, 2026.
When flying from Las Vegas to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 20% versus a flight in the evening.
Weekly flight availability from Las Vegas to Illinois
Explore weekly flight availability from Las Vegas to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 23, 2026.
The most flights from LAS to USIL are scheduled on a Tuesday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).
How much does it cost to fly round-trip from Las Vegas to Illinois?
How far ahead should I book a flight from Las Vegas to Illinois?
The best time to book flights from Las Vegas to Illinois is 83 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Las Vegas to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Las Vegas to Illinois. Price data was last updated on June 20, 2026.
Travelers seeking maximum savings on their Las Vegas to Illinois flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 23, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAllegiant Air from Las Vegas to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Las Vegas to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Las Vegas to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Las Vegas to Illinois by cabin class
Find flights from Las Vegas to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Las Vegas and Illinois flights
Browse other Las Vegas and Illinois flight options. Last updated on June 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Las Vegas to Illinois flights
Consider these flights traveling from Las Vegas to Illinois.
Top 7 airlines flying from Las Vegas to Illinois
Discover the top 7 airlines that operate flights from Las Vegas to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$54 | Average$241 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$110 | Average$236 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$134 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$159 | Average$330 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$159 | Average$357 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$376 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$208 | Average$456 | FlexibilityNo cancel fee | On-timeN/A |