$104+ Cheap flights from Buffalo (BUF) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
Dec 5 — Dec 121
Round-trip
1 adult, Economy
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Find cheap flights from Buffalo to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Buffalo to IllinoisExplore the most affordable flight options available from Buffalo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 5, 2026.
Explore the most affordable flight options available from Buffalo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 5, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/211:03 pm -
1 stop12h 40m
Tue 11/245:40 am -
1 stop13h 44m
Deal found 10/31![Frontier logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/211:03 pm -
1 stop7h 44m
Mon 11/238:42 pm -
1 stop22h 42m
Deal found 10/31![Frontier logo]()
$217
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/211:03 pm -
1 stop12h 40m
Mon 11/235:40 am -
1 stop13h 44m
Deal found 10/31![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/41:15 pm -
1 stop26h 15m
Tue 12/84:00 pm -
1 stop19h 20m
Deal found 10/31![Frontier logo]()
$233
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 12/41:15 pm -
1 stop5h 48m
Mon 12/75:35 am -
1 stop7h 00m
Deal found 10/31![Frontier logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/71:15 pm -
1 stop26h 15m
Thu 12/1010:29 pm -
1 stop12h 51m
Deal found 11/2![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 12/41:15 pm -
1 stop26h 15m
Thu 12/1010:29 pm -
1 stop12h 51m
Deal found 11/4![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/41:15 pm -
1 stop23h 18m
Tue 12/812:28 pm -
1 stop22h 52m
Deal found 10/31![Frontier logo]()
$255
This Trip.com deal was found by Cheapflights users on 11/4. 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.
Wed 11/182:00 pm -
1 stop10h 47m
Tue 11/248:42 pm -
1 stop22h 42m
Deal found 11/4![Frontier logo]()
$256
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 12/111:15 pm -
1 stop9h 14m
Sun 12/135:24 pm -
1 stop19h 11m
Deal found 11/2![Frontier logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/219:14 pm -
1 stop12h 00m
Tue 11/248:42 pm -
1 stop22h 42m
Deal found 10/31![Frontier logo]()
$258
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 12/189:47 am -
1 stop14h 44m
Mon 1/45:58 am -
1 stop10h 19m
Deal found 11/4![Frontier logo]()
$266
Best flights from Buffalo to IllinoisDiscover carefully curated flight deals from Buffalo to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 5, 2026.
Discover carefully curated flight deals from Buffalo to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 5, 2026.
This Southwest deal was found by Cheapflights users on 11/1. 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 12/38:05 am -
Nonstop1h 55m
Mon 12/78:10 am -
Nonstop1h 30m
Deal found 11/1![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/46:30 am -
Nonstop2h 14m
Thu 12/102:05 pm -
Nonstop1h 52m
Deal found 11/4![United Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 11/1. 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 12/226:00 am -
1 stop3h 49m
Fri 12/256:15 pm -
1 stop3h 33m
Deal found 11/1![Delta logo]()
$337
This American Airlines deal was found by Cheapflights users on 11/4. 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 11/194:18 pm -
2 stops8h 46m
Mon 11/236:00 am -
2 stops8h 48m
Deal found 11/4![American Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 11/2. 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 1/77:45 am -
Nonstop2h 00m
Fri 1/85:35 pm -
Nonstop1h 35m
Deal found 11/2![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Sat 12/125:40 pm -
Nonstop2h 14m
Mon 12/146:55 am -
Nonstop1h 49m
Deal found 11/4![United Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 10/31. 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.
Sat 11/218:00 am -
Nonstop1h 50m
Mon 11/236:40 pm -
Nonstop1h 35m
Deal found 10/31![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 10/31. 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.
Sat 11/2110:30 am -
Nonstop2h 13m
Mon 11/232:18 pm -
Nonstop1h 44m
Deal found 10/31![United Airlines logo]()
$317
This American Airlines deal was found by Cheapflights users on 11/3. 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 11/197:00 am -
2 stops10h 39m
Mon 11/2311:25 am -
2 stops9h 10m
Deal found 11/3![American Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Mon 12/215:35 pm -
Nonstop2h 19m
Fri 12/255:55 pm -
Nonstop1h 52m
Deal found 11/3![United Airlines logo]()
$324
This Southwest deal was found by Cheapflights users on 10/31. 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.
Sat 11/212:45 pm -
1 stop7h 45m
Tue 11/241:05 pm -
Nonstop1h 30m
Deal found 10/31![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 11/1. 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 2/233:45 pm -
1 stop6h 00m
Mon 3/17:35 am -
Nonstop1h 40m
Deal found 11/1![Southwest logo]()
$327
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/195:58 pm -
1 stop6h 00m
Mon 11/232:35 pm -
1 stop5h 01m
Deal found 11/4![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 11/3. 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 12/2211:35 am -
2 stops5h 45m
Fri 12/258:10 am -
2 stops9h 00m
Deal found 11/3![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 10/31. 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 12/225:52 pm -
1 stop3h 26m
Fri 12/259:00 am -
2 stops7h 12m
Deal found 10/31![Delta logo]()
$513
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/196:30 am -
1 stop4h 35m
Mon 11/236:30 am -
1 stop5h 47m
Deal found 11/3![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 11/3. 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 12/1212:06 pm -
1 stop5h 11m
Sun 12/136:20 am -
2 stops7h 59m
Deal found 11/3![Delta logo]()
$513
This American Airlines deal was found by Cheapflights users on 11/2. 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 11/1811:26 am -
1 stop4h 11m
Sun 11/223:01 pm -
1 stop18h 44m
Deal found 11/2![American Airlines logo]()
$539
This Delta deal was found by Cheapflights users on 11/1. 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 12/116:00 am -
1 stop5h 35m
Sun 12/132:41 pm -
2 stops8h 23m
Deal found 11/1![Delta logo]()
$513
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Wed 12/236:30 am -
Nonstop2h 22m
Sun 1/310:13 am -
Nonstop1h 50m
Deal found 11/2![United Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 10/31. 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.
Sun 12/136:10 am -
2 stops9h 39m
Tue 12/156:00 am -
1 stop7h 37m
Deal found 10/31![Delta logo]()
$513
This American Airlines deal was found by Cheapflights users on 11/3. 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 11/195:30 am -
2 stops10h 01m
Mon 11/235:11 am -
2 stops11h 51m
Deal found 11/3![American Airlines logo]()
$583
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Wed 11/185:58 pm -
1 stop6h 15m
Sun 11/2210:43 am -
1 stop5h 19m
Deal found 11/2![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 11/2. 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 11/175:58 pm -
1 stop4h 15m
Sat 11/212:35 pm -
1 stop5h 16m
Deal found 11/2![United Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 10/31. 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 11/155:58 pm -
1 stop6h 01m
Thu 11/196:30 am -
2 stops6h 50m
Deal found 10/31![United Airlines logo]()
$742
Last-minute flights from Buffalo to IllinoisDiscover last-minute flight deals from Buffalo to Illinois. Data last updated November 5, 2026 and is based on user searches.
Discover last-minute flight deals from Buffalo to Illinois. Data last updated November 5, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 11/4. 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.
Wed 11/182:00 pm -
1 stop10h 47m
Tue 11/248:42 pm -
1 stop22h 42m
Deal found 11/4![Frontier logo]()
$256
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/211:03 pm -
1 stop12h 40m
Tue 11/245:40 am -
1 stop13h 44m
Deal found 10/31![Frontier logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/211:03 pm -
1 stop7h 44m
Mon 11/238:42 pm -
1 stop22h 42m
Deal found 10/31![Frontier logo]()
$217
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/211:03 pm -
1 stop12h 40m
Mon 11/235:40 am -
1 stop13h 44m
Deal found 10/31![Frontier logo]()
$228
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/219:14 pm -
1 stop12h 00m
Tue 11/248:42 pm -
1 stop22h 42m
Deal found 10/31![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/41:15 pm -
1 stop26h 15m
Tue 12/84:00 pm -
1 stop19h 20m
Deal found 10/31![Frontier logo]()
$233
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 12/41:15 pm -
1 stop5h 48m
Mon 12/75:35 am -
1 stop7h 00m
Deal found 10/31![Frontier logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 12/41:15 pm -
1 stop26h 15m
Thu 12/1010:29 pm -
1 stop12h 51m
Deal found 11/4![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/41:15 pm -
1 stop23h 18m
Tue 12/812:28 pm -
1 stop22h 52m
Deal found 10/31![Frontier logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/71:15 pm -
1 stop26h 15m
Thu 12/1010:29 pm -
1 stop12h 51m
Deal found 11/2![Frontier logo]()
$245
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 12/111:15 pm -
1 stop9h 14m
Sun 12/135:24 pm -
1 stop19h 11m
Deal found 11/2![Frontier logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 12/189:47 am -
1 stop14h 44m
Mon 1/45:58 am -
1 stop10h 19m
Deal found 11/4![Frontier logo]()
$266
One-way flights from Buffalo to IllinoisSearch for one-way flight options from Buffalo to Illinois. Find affordable one-way fares based on user searches. Data last updated November 5, 2026.
Search for one-way flight options from Buffalo to Illinois. Find affordable one-way fares based on user searches. Data last updated November 5, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 11/1. 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 11/259:20 pm -
1 stop28h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/21:15 pm -
1 stop9h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$105
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 12/176:35 pm -
1 stop7h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$117
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 11/211:03 pm -
1 stop7h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$118
This Priceline deal was found by Cheapflights users on 11/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/41:15 pm -
1 stop5h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$119
This Cheapflightsfares deal was found by Cheapflights users on 11/1. 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 12/219:47 am -
1 stop14h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$123
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 12/199:38 pm -
1 stop22h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 11/2. 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.
Sat 11/211:03 pm -
1 stop12h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$124
This Expedia deal was found by Cheapflights users on 11/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/176:35 pm -
1 stop25h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$125
This Mytrip deal was found by Cheapflights users on 11/1. 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.
Tue 11/249:20 pm -
1 stop23h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$126
This Mytrip deal was found by Cheapflights users on 11/1. 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.
Tue 11/249:20 pm -
1 stop19h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$126
This Cheapflightsfares deal was found by Cheapflights users on 11/1. 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 2/199:38 pm -
1 stop28h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$133
Find flight deals from Buffalo to Illinois
Keep the following information in mind while searching for Buffalo to Illinois flight deals. Data was last updated November 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $198 (Cheapflightsfares) |
One-way from | $104 (Cheapflightsfares) |
Popular in | March |
Cheapest in | February |
Average price | $345 |
Good round-trip deal | $380 or less |
Good one-way deal | $233 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Buffalo 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 7,457,451 searches. Data last updated November 5, 2026.
Use the filters below to find and compare flights from Buffalo to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BuffaloChicago
BUF Buffalo - ORD Chicago O'Hare Intl
BUFORD
Buffalo
Thu 12/17
6:35 pm-12:56 am
1 stop7h 21m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$117
Quickest round-trip
BuffaloChicago
BUF Buffalo - MDW Chicago Midway
BUFMDW
Buffalo
Wed 11/25
3:25 pm-4:10 pm
Nonstop1h 45m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - ORD Chicago O'Hare Intl
BUFORD
Buffalo
Sat 12/12
5:40 pm-6:54 pm
Nonstop2h 14m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - MDW Chicago Midway
BUFMDW
Buffalo
Wed 12/23
3:35 pm-4:20 pm
Nonstop1h 45m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - ORD Chicago O'Hare Intl
BUFORD
Buffalo
Wed 11/25
10:30 am-11:43 am
Nonstop2h 13m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - MDW Chicago Midway
BUFMDW
Buffalo
Thu 11/26
1:35 pm-2:30 pm
Nonstop1h 55m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - ORD Chicago O'Hare Intl
BUFORD
Buffalo
Mon 12/21
5:35 pm-6:54 pm
Nonstop2h 19m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - ORD Chicago O'Hare Intl
BUFORD
Buffalo
Wed 12/23
5:35 pm-6:54 pm
Nonstop2h 19m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BuffaloChicago
BUF Buffalo - MDW Chicago Midway
BUFMDW
Buffalo
Thu 12/3
6:10 am-9:37 am
1 stop4h 27m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BuffaloChicago
BUF Buffalo - MDW Chicago Midway
BUFMDW
Buffalo
Wed 12/2
9:15 am-1:01 pm
1 stop4h 46m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
Showing 1-10 of 50 resultsSorted by cheapest first
Best time to book a flight from Buffalo to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Buffalo with our price prediction graph.
BUF-ORD
BUF-MDW
BUF-PIA
BUF-MLI
BUF-SPI
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 Buffalo to Illinois
BUF-USIL
BUF-ORD
BUF-MDW
BUF-PIA
BUF-MLI
What is the cheapest month to book a flight from Buffalo to Illinois?
Currently, January is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $281). Flying from Buffalo to Illinois in March is currently the most expensive (average of $433). 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 BUF to IL?
Find hourly flight availability from Buffalo 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 November 5, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 25% on flights from Buffalo to Illinois by exploring options for tickets in the afternoon.
Weekly flight availability from Buffalo to Illinois
Explore weekly flight availability from Buffalo 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 November 5, 2026.
The most flights from BUF to USIL are scheduled on a Monday (30 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (22 on average).
How much does it cost to fly round-trip from Buffalo to Illinois?
Airfare is below average for this route at the moment.
Buffalo to Illinois flights typically cost between $422 and $587 in November.The cheapest round-trip price found within the last 5 days was $198 on Frontier (Nov 21-Nov 24).
How far ahead should I book a flight from Buffalo to Illinois?
The best time to book flights from Buffalo to Illinois is 87 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 Buffalo to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Buffalo to Illinois. Price data was last updated on October 31, 2026.
Travelers seeking maximum savings on their Buffalo to Illinois flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday 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 November 5, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andJetBlue from Buffalo 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.
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Buffalo to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Buffalo 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 Buffalo to Illinois by cabin class
Find flights from Buffalo to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Buffalo and Illinois flights
Browse other Buffalo and Illinois flight options. Last updated on November 5, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Buffalo to Illinois flights
Consider these flights traveling from Buffalo to Illinois.
Top 3 airlines flying from Buffalo to Illinois
Discover the top 3 airlines that operate flights from Buffalo 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 7,457,451 searches. Data last updated November 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$177 | Average$378 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$235 | Average$375 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$261 | Average$389 | FlexibilityNo cancel fee | On-time63% |