$104+ Cheap flights from Illinois to Buffalo (BUF)
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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUF
Dec 4 — Dec 111
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Buffalo 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 Illinois to BuffaloExplore the most affordable flight options available from Illinois to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2026.
Explore the most affordable flight options available from Illinois to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2026.
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.
Sat 12/198:35 pm -
1 stop19h 50m
Mon 12/216:02 pm -
1 stop6h 59m
Deal found 11/4![Frontier logo]()
$217
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.
Fri 11/275:40 am -
1 stop13h 44m
Fri 12/41:15 pm -
1 stop5h 48m
Deal found 11/3![Frontier logo]()
$236
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:24 pm -
1 stop19h 11m
Mon 12/72:30 pm -
1 stop11h 38m
Deal found 11/3![Frontier logo]()
$239
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.
Tue 12/13:55 pm -
1 stop19h 24m
Fri 12/41:15 pm -
1 stop5h 48m
Deal found 11/2![Frontier logo]()
$244
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.
Thu 12/177:10 am -
1 stop24h 42m
Mon 12/219:47 am -
1 stop14h 15m
Deal found 11/3![Frontier logo]()
$247
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:49 am -
1 stop11h 40m
Thu 11/261:23 pm -
1 stop12h 19m
Deal found 11/2![Frontier logo]()
$258
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.
Thu 12/177:10 am -
1 stop24h 42m
Sun 12/206:20 pm -
1 stop7h 36m
Deal found 11/3![Frontier logo]()
$268
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:01 am -
1 stop11h 39m
Tue 12/226:35 pm -
1 stop7h 33m
Deal found 11/3![Frontier logo]()
$270
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.
Tue 12/112:33 pm -
1 stop22h 46m
Fri 12/41:15 pm -
1 stop23h 18m
Deal found 11/2![Frontier logo]()
$271
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.
Wed 12/165:24 pm -
1 stop23h 16m
Tue 12/296:35 pm -
1 stop7h 33m
Deal found 11/3![Frontier logo]()
$272
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 12/188:35 pm -
1 stop23h 08m
Mon 12/216:02 pm -
1 stop6h 59m
Deal found 11/4![Frontier logo]()
$277
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 12/188:35 pm -
1 stop23h 08m
Sun 12/206:20 pm -
1 stop26h 10m
Deal found 11/4![Frontier logo]()
$278
Best flights from Illinois to BuffaloDiscover carefully curated flight deals from Illinois to Buffalo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
Discover carefully curated flight deals from Illinois to Buffalo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 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 12/36:15 pm -
Nonstop1h 40m
Mon 12/72:00 pm -
Nonstop1h 50m
Deal found 11/1![Southwest logo]()
$317
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Tue 11/243:17 pm -
Nonstop1h 43m
Thu 11/267:52 am -
Nonstop2h 11m
Deal found 10/30![American Airlines logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 12/235:58 am -
1 stop9h 11m
Sun 1/36:35 pm -
1 stop7h 21m
Deal found 10/30![Frontier logo]()
$327
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/246:15 pm -
1 stop3h 33m
Fri 12/256:00 am -
1 stop3h 49m
Deal found 11/2![Delta logo]()
$337
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/42:05 pm -
Nonstop1h 52m
Sun 12/65:40 pm -
Nonstop2h 14m
Deal found 11/1![United Airlines logo]()
$353
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/21:25 pm -
Nonstop1h 35m
Wed 12/92:00 pm -
Nonstop1h 50m
Deal found 11/4![Southwest logo]()
$317
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/215:55 pm -
1 stop5h 06m
Fri 12/255:52 pm -
1 stop3h 26m
Deal found 11/2![Delta logo]()
$337
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.
Sat 11/215:11 pm -
1 stop5h 46m
Wed 12/27:00 am -
2 stops10h 31m
Deal found 11/2![American Airlines logo]()
$359
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.
Wed 12/21:15 pm -
2 stops7h 45m
Sat 12/510:10 am -
2 stops8h 15m
Deal found 11/3![Southwest logo]()
$347
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.
Sat 12/195:55 pm -
1 stop5h 06m
Mon 12/215:52 pm -
1 stop3h 26m
Deal found 11/1![Delta logo]()
$368
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.
Thu 11/195:51 pm -
Nonstop1h 45m
Sat 11/215:49 pm -
Nonstop2h 13m
Deal found 10/31![United Airlines logo]()
$407
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 11/196:00 am -
2 stops8h 48m
Mon 11/236:40 pm -
1 stop6h 24m
Deal found 11/4![American Airlines logo]()
$384
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.
Fri 12/48:10 am -
Nonstop1h 30m
Sun 12/65:30 pm -
2 stops6h 15m
Deal found 11/1![Southwest logo]()
$368
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/205:55 pm -
1 stop5h 06m
Fri 12/255:52 pm -
1 stop3h 26m
Deal found 11/2![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 10/30. 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 12/235:55 pm -
Nonstop1h 52m
Sun 1/36:30 am -
Nonstop2h 22m
Deal found 10/30![United Airlines logo]()
$415
This United Airlines deal was found by Cheapflights users on 10/30. 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 1/69:00 am -
1 stop6h 51m
Sat 1/96:30 am -
1 stop4h 35m
Deal found 10/30![United Airlines logo]()
$439
This Southwest deal was found by Cheapflights users on 10/30. 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 11/257:05 pm -
Nonstop1h 30m
Mon 11/305:40 pm -
1 stop6h 35m
Deal found 10/30![Southwest logo]()
$408
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/215:37 pm -
1 stop5h 20m
Fri 11/276:40 pm -
1 stop6h 24m
Deal found 11/1![American Airlines logo]()
$454
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.
Wed 12/235:55 pm -
1 stop5h 06m
Sat 12/266:00 am -
1 stop4h 49m
Deal found 10/31![Delta logo]()
$438
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/276:25 am -
1 stop5h 47m
Tue 3/21:47 pm -
1 stop5h 51m
Deal found 11/1![United Airlines logo]()
$439
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.
Sat 2/278:27 am -
1 stop3h 45m
Tue 3/21:47 pm -
1 stop4h 59m
Deal found 11/2![United Airlines logo]()
$439
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.
Fri 11/205:00 am -
2 stops9h 48m
Mon 11/237:52 am -
1 stop7h 07m
Deal found 11/2![American Airlines logo]()
$522
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/215:55 pm -
1 stop5h 06m
Sun 12/276:00 am -
1 stop4h 49m
Deal found 11/2![Delta logo]()
$478
This United Airlines deal was found by Cheapflights users on 10/30. 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 1/92:26 pm -
1 stop5h 26m
Tue 1/126:30 am -
1 stop4h 33m
Deal found 10/30![United Airlines logo]()
$439
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/195:55 pm -
Nonstop1h 40m
Sun 12/206:30 am -
Nonstop2h 14m
Deal found 11/1![United Airlines logo]()
$443
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/75:59 pm -
Nonstop1h 52m
Sun 1/1010:15 am -
Nonstop2h 17m
Deal found 11/1![United Airlines logo]()
$443
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/184:28 pm -
1 stop5h 38m
Sun 12/207:03 am -
1 stop9h 43m
Deal found 11/1![American Airlines logo]()
$665
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.
Fri 12/188:31 am -
2 stops12h 27m
Mon 12/216:25 am -
1 stop5h 30m
Deal found 11/4![American Airlines logo]()
$983
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 11/1512:13 pm -
1 stop4h 52m
Thu 11/197:52 am -
1 stop4h 46m
Deal found 10/30![American Airlines logo]()
$1,010
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/305:53 am -
1 stop3h 52m
Thu 12/37:53 am -
1 stop4h 35m
Deal found 11/1![American Airlines logo]()
$1,010
Last-minute flights from Illinois to BuffaloDiscover last-minute flight deals from Illinois to Buffalo. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Buffalo. Data last updated November 4, 2026 and is based on user searches.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:49 am -
1 stop11h 40m
Thu 11/261:23 pm -
1 stop12h 19m
Deal found 11/2![Frontier logo]()
$258
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.
Fri 11/275:40 am -
1 stop13h 44m
Fri 12/41:15 pm -
1 stop5h 48m
Deal found 11/3![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.
Tue 12/13:55 pm -
1 stop19h 24m
Fri 12/41:15 pm -
1 stop5h 48m
Deal found 11/2![Frontier logo]()
$244
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.
Tue 12/112:33 pm -
1 stop22h 46m
Fri 12/41:15 pm -
1 stop23h 18m
Deal found 11/2![Frontier logo]()
$271
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:24 pm -
1 stop19h 11m
Mon 12/72:30 pm -
1 stop11h 38m
Deal found 11/3![Frontier logo]()
$239
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.
Wed 12/165:24 pm -
1 stop23h 16m
Tue 12/296:35 pm -
1 stop7h 33m
Deal found 11/3![Frontier logo]()
$272
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.
Thu 12/177:10 am -
1 stop24h 42m
Mon 12/219:47 am -
1 stop14h 15m
Deal found 11/3![Frontier logo]()
$247
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.
Thu 12/177:10 am -
1 stop24h 42m
Sun 12/206:20 pm -
1 stop7h 36m
Deal found 11/3![Frontier logo]()
$268
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:01 am -
1 stop11h 39m
Tue 12/226:35 pm -
1 stop7h 33m
Deal found 11/3![Frontier logo]()
$270
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 12/188:35 pm -
1 stop23h 08m
Mon 12/216:02 pm -
1 stop6h 59m
Deal found 11/4![Frontier logo]()
$277
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 12/188:35 pm -
1 stop23h 08m
Sun 12/206:20 pm -
1 stop26h 10m
Deal found 11/4![Frontier logo]()
$278
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.
Sat 12/198:35 pm -
1 stop19h 50m
Mon 12/216:02 pm -
1 stop6h 59m
Deal found 11/4![Frontier logo]()
$217
One-way flights from Illinois to BuffaloSearch for one-way flight options from Illinois to Buffalo. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
Search for one-way flight options from Illinois to Buffalo. Find affordable one-way fares based on user searches. Data last updated November 4, 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.
Sat 12/198:35 pm -
1 stop19h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$104
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:40 am -
1 stop13h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$104
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 12/218:35 pm -
1 stop20h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$123
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.
Wed 12/305:58 am -
1 stop9h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$123
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.
Tue 11/248:42 pm -
1 stop22h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$124
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.
Sat 11/217:49 am -
1 stop11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$124
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/33:36 pm -
1 stop20h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$125
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:24 pm -
1 stop19h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$125
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:35 am -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$128
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/215:53 pm -
1 stop22h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$130
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.
Thu 12/177:10 am -
1 stop24h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$134
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.
Mon 12/145:35 am -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$138
Find flight deals from Illinois to Buffalo
Keep the following information in mind while searching for Illinois to Buffalo flight deals. Data was last updated November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $217 (Cheapflightsfares) |
One-way from | $104 (Cheapflightsfares) |
Popular in | February |
Cheapest in | April |
Average price | $349 |
Good round-trip deal | $373 or less |
Good one-way deal | $189 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Buffalo 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 4, 2026.
Use the filters below to find and compare flights from Illinois to Buffalo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoBuffalo
MDW Chicago Midway - BUF Buffalo
MDWBUF
Chicago Midway
Mon 12/7
1:25 pm-4:00 pm
Nonstop1h 35m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$159
ChicagoBuffalo
ORD Chicago O'Hare Intl - BUF Buffalo
ORDBUF
Chicago O'Hare Intl
Mon 12/14
6:55 am-9:44 am
Nonstop1h 49m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$159
ChicagoBuffalo
ORD Chicago O'Hare Intl - BUF Buffalo
ORDBUF
Chicago O'Hare Intl
Mon 12/7
7:05 pm-9:55 pm
Nonstop1h 50m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$159
Quickest round-trip
ChicagoBuffalo
MDW Chicago Midway - BUF Buffalo
MDWBUF
Chicago Midway
Mon 12/14
8:10 am-10:40 am
Nonstop1h 30m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$159
ChicagoBuffalo
MDW Chicago Midway - BUF Buffalo
MDWBUF
Chicago Midway
Wed 12/16
6:41 pm-12:01 am
1 stop4h 20m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$169
ChicagoBuffalo
MDW Chicago Midway - BUF Buffalo
MDWBUF
Chicago Midway
Mon 12/7
9:37 am-3:19 pm
1 stop4h 42m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$169
ChicagoBuffalo
ORD Chicago O'Hare Intl - BUF Buffalo
ORDBUF
Chicago O'Hare Intl
Thu 11/26
2:44 pm-6:58 pm
1 stop3h 14m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$169
ChicagoBuffalo
ORD Chicago O'Hare Intl - BUF Buffalo
ORDBUF
Chicago O'Hare Intl
Sat 12/19
5:55 pm-12:01 am
1 stop5h 06m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$169
ChicagoBuffalo
ORD Chicago O'Hare Intl - BUF Buffalo
ORDBUF
Chicago O'Hare Intl
Wed 12/16
6:00 am-2:37 pm
1 stop7h 37m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$169
ChicagoBuffalo
ORD Chicago O'Hare Intl - BUF Buffalo
ORDBUF
Chicago O'Hare Intl
Sun 12/13
10:29 am-1:17 pm
Nonstop1h 48m
Buffalo
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
Showing 1-10 of 50 resultsSorted by cheapest first
Best time to book a flight from Illinois to Buffalo
Have a flexible travel schedule? Discover the best time to fly to Buffalo from Illinois with our price prediction graph.
MDW-BUF
ORD-BUF
PIA-BUF
MLI-BUF
BMI-BUF
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 Buffalo
USIL-BUF
MDW-BUF
ORD-BUF
PIA-BUF
MLI-BUF
What is the cheapest month to book a flight from Illinois to Buffalo?
Currently, January is the cheapest month in which you can book a flight from Illinois to Buffalo (average of $315). Flying from Illinois to Buffalo in October is currently the most expensive (average of $449). 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 BUF?
Find hourly flight availability from Illinois to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2026.
A simple way to save on the total cost of your ticket is to fly from Illinois to Buffalo in the afternoon. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight in the evening.
Weekly flight availability from Illinois to Buffalo
Explore weekly flight availability from Illinois to Buffalo. 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 4, 2026.
The most flights from USIL to BUF are scheduled on a Monday (30 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).
How much does it cost to fly round-trip from Illinois to Buffalo?
Airfare is below average for this route at the moment.
Illinois to Buffalo flights typically cost between $317 and $450 in November.The cheapest round-trip price found within the last 5 days was $236 on Frontier (Nov 27-Dec 4).
How far ahead should I book a flight from Illinois to Buffalo?
The price you pay for your flight from Illinois to Buffalo may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Illinois to Buffalo?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Buffalo. Price data was last updated on October 31, 2026.
Travelers seeking maximum savings on their Illinois to Buffalo flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday evenings 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 Buffalo. 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 Buffalo?
Book flights to Buffalo if you plan to visit one of these locationsCheektowaga
Lockport
Amherst
Williamsville
Orchard Park
Eden
Bowmansville
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.
Alternative routes
Buffalo flight routes
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Alternative routes for Illinois to Buffalo
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Buffalo
Explore flights to Buffalo departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 4, 2026.
Complete your trip
Complete your trip to Buffalo by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Buffalo by cabin class
Find flights from Illinois to Buffalo, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Buffalo flights
Browse other Illinois and Buffalo flight options. Last updated on November 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Illinois to Buffalo flights
Consider these flights traveling from Illinois to Buffalo.
Top 4 airlines flying from Illinois to Buffalo
Discover the top 4 airlines that operate flights from Illinois to Buffalo. 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 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$98 | Average$254 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$240 | Average$432 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$251 | Average$444 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$281 | Average$425 | FlexibilityNo cancel fee | On-time63% |