$48+ Cheap flights from Illinois to Las Vegas (LAS)
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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAS
Jul 24 — Jul 311
Round-trip
1 adult, Economy
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Cheapest flights from Illinois to Las VegasExplore the most affordable flight options available from Illinois to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 24, 2026.
Explore the most affordable flight options available from Illinois to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 24, 2026.
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.
Sun 8/231:06 pm
MLI
- LAS
Nonstop3h 25m
Allegiant Air
Thu 8/277:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$111
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/301:06 pm
MLI
- LAS
Nonstop3h 25m
Allegiant Air
Thu 9/37:05 am
LAS
- MLI
Nonstop3h 18m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$129
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.
Sun 9/271:13 pm
MLI
- LAS
Nonstop3h 24m
Allegiant Air
Thu 10/17:05 am
LAS
- MLI
Nonstop3h 10m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$148
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/212:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 8/136:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$159
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 8/412:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/20![Frontier logo]()
$161
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.
Mon 7/207:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Thu 7/2312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$164
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/212:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 8/66:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$165
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 7/2812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/20![Frontier logo]()
$165
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.
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 7/1512:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$166
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 8/1912:25 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/20![Frontier logo]()
$167
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.
Sun 8/1612:31 pm
MLI
- LAS
Nonstop3h 32m
Allegiant Air
Sun 8/237:05 am
LAS
- MLI
Nonstop3h 11m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$168
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 8/1812:25 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/20![Frontier logo]()
$168
Best flights from Illinois to Las VegasDiscover carefully curated flight deals from Illinois to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 24, 2026.
Discover carefully curated flight deals from Illinois to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 24, 2026.
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.
Tue 8/115:35 am
STL
- LAS
Nonstop3h 25m
Southwest
Sat 8/157:45 am
LAS
- STL
1 stop5h 40m
Southwest
Deal found 6/22![Southwest logo]()
$199
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.
Sun 7/195:10 am
STL
- LAS
1 stop5h 57m
United Airlines
Thu 7/2311:30 pm
LAS
- STL
1 stop7h 09m
United Airlines
Deal found 6/18![United Airlines logo]()
$217
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 9/179:29 pm
RFD
- LAS
Nonstop3h 39m
Multiple Airlines
Tue 9/228:14 pm
LAS
- RFD
1 stop15h 05m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$242
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:29 pm
RFD
- LAS
Nonstop3h 39m
Allegiant Air
Sun 9/63:15 pm
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$252
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:20 am
ORD
- LAS
1 stop13h 12m
Alaska Airlines
Mon 8/107:21 pm
LAS
- ORD
1 stop16h 00m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$255
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:09 pm
MLI
- LAS
1 stop7h 56m
Delta
Wed 8/126:00 am
LAS
- MLI
1 stop8h 22m
Delta
Deal found 6/21![Delta logo]()
$261
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 8/121:46 pm
BMI
- LAS
1 stop8h 51m
American Airlines
Sat 8/156:29 am
LAS
- BMI
2 stops7h 50m
American Airlines
Deal found 6/23![American Airlines logo]()
$436
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.
Mon 9/217:20 am
ORD
- LAS
1 stop6h 44m
Alaska Airlines
Thu 9/242:51 pm
LAS
- ORD
1 stop7h 08m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$255
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.
Sun 8/91:24 pm
RFD
- LAS
Nonstop3h 41m
Allegiant Air
Sun 8/167:10 am
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$259
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.
Tue 7/149:10 pm
MDW
- LAS
Nonstop4h 00m
Southwest
Wed 7/157:40 am
LAS
- MDW
1 stop4h 55m
Southwest
Deal found 6/21![Southwest logo]()
$285
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 7/269:19 am
RFD
- LAS
1 stop10h 21m
Multiple Airlines
Thu 7/307:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$291
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.
Wed 7/157:29 am
ORD
- LAS
1 stop6h 43m
Delta
Wed 7/229:59 am
LAS
- ORD
1 stop6h 30m
Delta
Deal found 6/22![Delta logo]()
$295
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 8/209:35 pm
RFD
- LAS
Nonstop3h 46m
Allegiant Air
Sun 8/233:18 pm
LAS
- RFD
Nonstop3h 27m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$276
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:45 pm
ORD
- LAS
Nonstop4h 07m
United Airlines
Mon 8/314:34 pm
LAS
- ORD
1 stop5h 25m
United Airlines
Deal found 6/22![United Airlines logo]()
$305
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/122:10 pm
MDW
- LAS
Nonstop3h 50m
Southwest
Mon 8/175:00 am
LAS
- MDW
Nonstop3h 25m
Southwest
Deal found 6/20![Southwest logo]()
$285
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/248:20 pm
ORD
- LAS
1 stop16h 09m
Alaska Airlines
Tue 7/282:38 pm
LAS
- ORD
1 stop6h 58m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$294
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.
Sat 8/86:00 am
ORD
- LAS
1 stop8h 38m
Delta
Sat 8/156:20 am
LAS
- ORD
1 stop7h 10m
Delta
Deal found 6/23![Delta logo]()
$295
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.
Fri 8/2811:15 am
STL
- LAS
2 stops13h 37m
United Airlines
Mon 8/317:10 am
LAS
- STL
1 stop6h 28m
United Airlines
Deal found 6/18![United Airlines logo]()
$312
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:50 pm
RFD
- LAS
1 stop17h 39m
Multiple Airlines
Sun 7/57:00 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$320
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:45 pm
MDW
- LAS
Nonstop3h 55m
Southwest
Sun 9/135:20 am
LAS
- MDW
Nonstop3h 25m
Southwest
Deal found 6/23![Southwest logo]()
$293
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/312:20 pm
ORD
- LAS
1 stop9h 23m
Alaska Airlines
Mon 8/37:21 pm
LAS
- ORD
1 stop16h 00m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$294
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.
Sat 9/54:45 pm
ORD
- LAS
1 stop7h 51m
Delta
Tue 9/89:59 am
LAS
- ORD
1 stop8h 31m
Delta
Deal found 6/23![Delta logo]()
$295
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:00 am
ORD
- LAS
1 stop6h 09m
United Airlines
Mon 9/74:08 pm
LAS
- ORD
Nonstop3h 52m
United Airlines
Deal found 6/20![United Airlines logo]()
$313
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 8/211:13 pm
RFD
- LAS
1 stop12h 30m
Multiple Airlines
Sun 8/233:18 pm
LAS
- RFD
Nonstop3h 27m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$322
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.
Wed 8/261:50 pm
ORD
- LAS
1 stop7h 56m
Delta
Wed 9/22:02 pm
LAS
- ORD
1 stop5h 45m
Delta
Deal found 6/23![Delta logo]()
$295
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.
Sun 7/51:14 pm
RFD
- LAS
Nonstop3h 39m
Allegiant Air
Thu 7/97:00 am
LAS
- RFD
Nonstop3h 24m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$327
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:35 am
MDW
- LAS
1 stop6h 15m
Southwest
Sun 9/65:45 pm
LAS
- MDW
Nonstop3h 30m
Southwest
Deal found 6/19![Southwest logo]()
$299
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:10 am
MDW
- LAS
1 stop5h 05m
Southwest
Mon 7/2711:55 pm
LAS
- MDW
Nonstop3h 30m
Southwest
Deal found 6/23![Southwest logo]()
$299
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 8/139:01 am
RFD
- LAS
1 stop10h 39m
Multiple Airlines
Sun 8/167:10 am
LAS
- RFD
Nonstop3h 24m
Multiple Airlines
Deal found 6/23![Multiple Airlines logo]()
$332
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/101:50 pm
ORD
- LAS
1 stop7h 37m
Delta
Sat 9/129:33 am
LAS
- ORD
1 stop6h 00m
Delta
Deal found 6/21![Delta logo]()
$305
Last-minute flights from Illinois to Las VegasDiscover last-minute flight deals from Illinois to Las Vegas. Data last updated June 24, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Las Vegas. Data last updated June 24, 2026 and is based on user searches.
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.
Sun 7/512:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 7/166:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$204
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.
Mon 7/1312:49 pm
PIA
- LAS
Nonstop3h 33m
Allegiant Air
Fri 7/316:40 am
LAS
- PIA
Nonstop3h 19m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$180
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.
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Wed 7/1512:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$166
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.
Thu 7/167:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Thu 7/2312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/19![Frontier logo]()
$173
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 7/167:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 7/216:00 am
LAS
- STL
1 stop11h 23m
Frontier
Deal found 6/21![Frontier logo]()
$174
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.
Fri 7/177:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 7/2112:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$175
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.
Mon 7/207:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Thu 7/2312:50 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/21![Frontier logo]()
$164
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 8/412:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/20![Frontier logo]()
$161
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Tue 7/2812:40 pm
LAS
- STL
Nonstop3h 25m
Frontier
Deal found 6/20![Frontier logo]()
$165
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 7/2312:31 pm
MLI
- LAS
Nonstop3h 27m
Allegiant Air
Thu 8/66:25 am
LAS
- MLI
Nonstop3h 16m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$190
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 7/2312:31 pm
MLI
- LAS
Nonstop3h 27m
Multiple Airlines
Sat 8/19:48 pm
LAS
- MLI
1 stop13h 15m
Multiple Airlines
Deal found 6/23![Multiple Airlines logo]()
$222
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.
Sat 7/257:15 am
ORD
- LAS
Nonstop4h 08m
Frontier
Sat 8/16:00 am
LAS
- ORD
1 stop12h 52m
Frontier
Deal found 6/23![Frontier logo]()
$228
One-way flights from Illinois to Las VegasSearch for one-way flight options from Illinois to Las Vegas. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
Search for one-way flight options from Illinois to Las Vegas. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
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 7/217:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$48
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.
Wed 7/157:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![Frontier logo]()
$49
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/23![Frontier logo]()
$54
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/23![Frontier logo]()
$55
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.
Wed 7/227:03 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/22![Frontier logo]()
$56
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 8/147:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/21![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.
Thu 7/167:10 pm
STL
- LAS
Nonstop3h 33m
Frontier
Deal found 6/22![Frontier logo]()
$58
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.
Sun 8/231:06 pm
MLI
- LAS
Nonstop3h 25m
Allegiant Air
Deal found 6/19![Allegiant Air logo]()
$71
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 8/217:19 pm
PIA
- LAS
Nonstop3h 30m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$75
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.
Tue 9/2212:46 pm
STL
- LAS
Nonstop3h 43m
Frontier
Deal found 6/21![Frontier logo]()
$93
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:46 pm
STL
- LAS
Nonstop3h 43m
Frontier
Deal found 6/20![Frontier logo]()
$94
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 8/287:19 pm
PIA
- LAS
Nonstop3h 30m
Allegiant Air
Deal found 6/21![Allegiant Air logo]()
$96
Find flight deals from Illinois to Las Vegas
Keep the following information in mind while searching for Illinois to Las Vegas flight deals. Data was last updated June 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $111 (Cheapflightsfares) |
One-way from | $48 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $358 |
Good round-trip deal | $189 or less |
Good one-way deal | $118 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Las Vegas 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 24, 2026.
Use the filters below to find and compare flights from Illinois to Las Vegas that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 8/11
5:35 am-7:00 am
Nonstop3h 25m
Las Vegas Harry Reid Intl
Sat 8/15
7:45 am-3:25 pm
1 stop5h 40m
$199
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Sun 7/19
5:10 am-9:07 am
1 stop5h 57m
Las Vegas Harry Reid Intl
Thu 7/23
11:30 pm-8:39 am
1 stop7h 09m
$217
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 9/17
9:29 pm-11:08 pm
Nonstop3h 39m
Las Vegas Harry Reid Intl
Tue 9/22
8:14 pm-1:19 pm
1 stop15h 05m
$242
Quickest round-trip
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 9/3
9:29 pm-11:08 pm
Nonstop3h 39m
Las Vegas Harry Reid Intl
Sun 9/6
3:15 pm-8:39 pm
Nonstop3h 24m
$252
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Sat 8/8
6:20 am-5:32 pm
1 stop13h 12m
Las Vegas Harry Reid Intl
Mon 8/10
7:21 pm-1:21 pm
1 stop16h 00m
$255
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Mon 9/21
7:20 am-12:04 pm
1 stop6h 44m
Las Vegas Harry Reid Intl
Thu 9/24
2:51 pm-11:59 pm
1 stop7h 08m
$255
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 8/9
1:24 pm-3:05 pm
Nonstop3h 41m
Las Vegas Harry Reid Intl
Sun 8/16
7:10 am-12:34 pm
Nonstop3h 24m
$259
MolineLas Vegas
MLI - LAS
MLILAS
Moline Quad-City
Sat 8/8
5:09 pm-11:05 pm
1 stop7h 56m
Las Vegas Harry Reid Intl
Wed 8/12
6:00 am-4:22 pm
1 stop8h 22m
$261
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 8/20
9:35 pm-11:21 pm
Nonstop3h 46m
Las Vegas Harry Reid Intl
Sun 8/23
3:18 pm-8:45 pm
Nonstop3h 27m
$276
ChicagoLas Vegas
MDW - LAS
MDWLAS
Chicago Midway
Tue 7/14
9:10 pm-11:10 pm
Nonstop4h 00m
Las Vegas Harry Reid Intl
Wed 7/15
7:40 am-2:35 pm
1 stop4h 55m
$285
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Las Vegas
Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Illinois with our price prediction graph.
MLI-LAS
STL-LAS
RFD-LAS
MDW-LAS
ORD-LAS
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 Illinois to Las Vegas
USIL-LAS
MLI-LAS
STL-LAS
RFD-LAS
MDW-LAS
What is the cheapest month to book a flight from Illinois to Las Vegas?
Currently, November is the cheapest month in which you can book a flight from Illinois to Las Vegas (average of $239). Flying from Illinois to Las Vegas in June is currently the most expensive (average of $382). 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 IL to LAS?
Find hourly flight availability from Illinois to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 24, 2026.
A simple way to save on the total cost of your ticket is to fly from Illinois to Las Vegas in the evening. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the afternoon.
Weekly flight availability from Illinois to Las Vegas
Explore weekly flight availability from Illinois to Las Vegas. 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 24, 2026.
The most flights from USIL to LAS are scheduled on a Tuesday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from Illinois to Las Vegas?
How far ahead should I book a flight from Illinois to Las Vegas?
The best time to book flights from Illinois to Las Vegas is 82 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 Illinois to Las Vegas?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Las Vegas. Price data was last updated on June 20, 2026.
Travelers seeking maximum savings on their Illinois to Las Vegas flight should consider departing on Friday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Las Vegas. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Las Vegas?
Book flights to Las Vegas if you plan to visit one of these locationsParadise
Mesquite
Henderson
North Las Vegas
Kingman
Winchester
Boulder City
Needles
Sunrise Manor
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 Illinois to Las Vegas
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Complete your trip
Complete your trip to Las Vegas by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Las Vegas by cabin class
Find flights from Illinois to Las Vegas, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Las Vegas
Explore flights to Las Vegas departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 24, 2026.
Illinois and Las Vegas flights
Browse other Illinois and Las Vegas flight options. Last updated on June 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Illinois to Las Vegas flights
Consider these flights traveling from Illinois to Las Vegas.
Top 8 airlines flying from Illinois to Las Vegas
Discover the top 8 airlines that operate flights from Illinois to Las Vegas. 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 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$268 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$118 | Average$294 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$125 | Average$308 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$337 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$159 | Average$439 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$159 | Average$356 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$160 | Average$389 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$240 | Average$338 | FlexibilityNo cancel fee | On-time75% |