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$64+ Cheap flights from Illinois to Buffalo (BUF)

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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUF
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
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Cheap flight deals from Illinois to Buffalo

Cheapest flights from Illinois to Buffalo
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 December 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/178:00 amORD - BUF
2 stops28h 12mFrontier
Fri 1/91:15 pmBUF - ORD
1 stop23h 20mFrontier
Deal found 11/30$165
This American Airlines deal was found by Cheapflights users on 12/2. 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 12/178:59 pmORD - BUF
Nonstop1h 40mAmerican Airlines
Sat 1/1711:22 amBUF - ORD
Nonstop2h 15mAmerican Airlines
Deal found 12/2$184
This United Airlines deal was found by Cheapflights users on 12/1. 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.
Wed 12/3110:35 amORD - BUF
Nonstop1h 49mUnited Airlines
Wed 1/75:23 pmBUF - ORD
Nonstop2h 07mUnited Airlines
Deal found 12/1$188
This Mytrip deal was found by Cheapflights users on 12/1. 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.
Mon 12/296:12 amMDW - BUF
1 stop9h 33mFrontier
Mon 1/55:45 pmBUF - MDW
1 stop5h 27mFrontier
Deal found 12/1$194
This Mytrip deal was found by Cheapflights users on 12/1. 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.
Thu 12/113:10 pmMDW - BUF
1 stop19h 41mFrontier
Mon 12/1511:40 amBUF - MDW
1 stop11h 32mFrontier
Deal found 12/1$196
This American Airlines deal was found by Cheapflights users on 12/1. 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.
Wed 12/316:07 amORD - BUF
1 stop5h 09mAmerican Airlines
Wed 1/77:30 amBUF - ORD
Nonstop2h 23mAmerican Airlines
Deal found 12/1$198
This Southwest deal was found by Cheapflights users on 12/1. 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.
Wed 12/311:25 pmMDW - BUF
Nonstop1h 25mSouthwest
Wed 1/75:50 amBUF - MDW
1 stop6h 45mSouthwest
Deal found 12/1$203
This JetBlue deal was found by Cheapflights users on 12/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1711:25 amORD - BUF
1 stop4h 59mJetBlue
Sat 1/1710:00 amBUF - ORD
1 stop8h 43mJetBlue
Deal found 12/2$203
This Delta deal was found by Cheapflights users on 12/2. 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.
Wed 12/176:40 pmMDW - BUF
1 stop3h 18mDelta
Sat 1/176:03 amBUF - MDW
1 stop3h 49mDelta
Deal found 12/2$209
This Mytrip deal was found by Cheapflights users on 12/1. 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.
Fri 12/122:26 pmORD - BUF
1 stop22h 49mFrontier
Sun 12/143:18 pmBUF - ORD
1 stop22h 58mFrontier
Deal found 12/1$221
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:15 amMDW - BUF
1 stop27h 30mFrontier
Sun 1/47:58 pmBUF - MDW
2 stops51h 19mFrontier
Deal found 12/1$235
This Southwest deal was found by Cheapflights users on 12/1. 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.
Wed 12/316:05 amORD - BUF
1 stop7h 55mSouthwest
Wed 1/77:30 amBUF - ORD
1 stop8h 15mSouthwest
Deal found 12/1$238

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 December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$127
(United Airlines)

One-way from

$64
(Southwest)

Popular in

January

Cheapest in

September

Average price

$375

Good round-trip deal

$304 or less

Good one-way deal

$199 or less
Provider with most accurate pricing for Chicago (CHI)-Buffalo flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Buffalo flights.
Search Deals
From Illinois to Buffalo
Search Deals
One-way flight from Illinois to Buffalo
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Buffalo.
Search Deals
Price to beat on a one-way flight from Illinois to Buffalo.
Search Deals

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 2,558,603 searches. Data last updated December 3, 2025.
Use the filters below to find and compare flights from Illinois to Buffalo that are best for you.

Fly from

Illinois

Fly to

Buffalo

Route

Depart

Return

Price

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 1/6

5:50 pm-8:29 pm

Nonstop1h 39m

Buffalo

Tue 1/13

10:45 am-11:52 am

Nonstop2h 07m

$127

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Sat 1/17

8:10 am-10:52 am

Nonstop1h 42m

Buffalo

Mon 1/19

5:16 pm-6:40 pm

Nonstop2h 24m

$145

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 2/3

5:50 pm-8:29 pm

Nonstop1h 39m

Buffalo

Fri 2/6

8:30 am-9:37 am

Nonstop2h 07m

$145

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Sat 1/10

8:10 am-10:52 am

Nonstop1h 42m

Buffalo

Sun 1/11

7:30 am-8:53 am

Nonstop2h 23m

$146

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 1/8

8:27 pm-8:13 am

1 stop10h 46m

Buffalo

Mon 1/12

1:15 pm-10:39 pm

1 stop10h 24m

$162

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Fri 1/16

5:50 pm-8:29 pm

Nonstop1h 39m

Buffalo

Sun 1/18

8:30 am-9:37 am

Nonstop2h 07m

$163

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 1/8

5:50 pm-8:29 pm

Nonstop1h 39m

Buffalo

Sun 1/11

8:30 am-9:37 am

Nonstop2h 07m

$163

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 12/17

8:00 am-1:12 pm

2 stops28h 12m

Buffalo

Fri 1/9

1:15 pm-11:35 am

1 stop23h 20m

$165

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Tue 2/3

10:48 am-5:54 pm

1 stop6h 06m

Buffalo

Fri 2/6

12:14 pm-5:29 pm

1 stop6h 15m

$170

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 2/3

10:35 am-4:59 pm

1 stop5h 24m

Buffalo

Fri 2/6

6:00 am-10:55 am

1 stop5h 55m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 60 results
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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.
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

What is the cheapest month to book a flight from Illinois to Buffalo?

Currently, October is the cheapest month in which you can book a flight from Illinois to Buffalo (average of $117). Flying from Illinois to Buffalo in July is currently the most expensive (average of $231). 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 December 3, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Buffalo in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the afternoon.

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 December 16, 2024.

Travelers seeking maximum savings on their Illinois to Buffalo flight should consider departing on Monday evenings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 3, 2025.

The most flights from USIL to BUF are scheduled on a Tuesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (20 on average).

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.

  • What airport do you fly into for flights to Buffalo from Illinois?

    If you book a flight to Buffalo from Illinois, you will be flying to Buffalo, which is the city’s only airport. Buffalo (BUF) is located 8.3 mi from the center of Buffalo.

  • How long is the flight from Illinois to Buffalo?

    A quick flight from Illinois to Buffalo can take about 1h 39m. United Airlines provides one of the quickest options available for as low as $127. There are 472 mi between Illinois and Buffalo. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Illinois to Buffalo one-way?

    One-way options have recently been found by users for as low as $80 on Southwest. Other airlines that offer cheap prices include American Airlines from $101 and Frontier from $105 one-way.

  • What are the most popular routes from Illinois to Buffalo?

    The most popular flight routes from Illinois to Buffalo are Chicago O'Hare Intl - Buffalo, Chicago Midway - Buffalo and Lambert-St Louis - Buffalo.

  • What are the most reliable airlines from Illinois to Buffalo?

    Before booking your flight to Buffalo from Illinois, check out the most reliable airlines to get you to your destination on time: Envoy Air (78%), SkyWest Airlines (77%), Japan Airlines( 77%).

  • What are the cheapest flights from Illinois to Buffalo?

    While on average a flight from Illinois to Buffalo is generally $322, our data shows the cheapest flight currently is $119. When looking at the most popular route, (Chicago O'Hare Intl - Buffalo), you can expect to pay $127 for that flight.

  • Can I find deals for flights from Illinois to Buffalo that include hotel bookings?

    Yes. In addition to deals on Illinois to Buffalo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Buffalo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Buffalo.

  • Can I find deals for business class flights from Illinois to Buffalo?

    Yes. Cheapflights offers flight deals from Illinois to Buffalo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Buffalo?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Buffalo (average of $117). Flying from Illinois to Buffalo in July is currently the most expensive (average of $231). 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.

See more FAQs

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Lockport
Cheektowaga
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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See prices for flight routes from nearby airports that may be better suited for you.
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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 2,558,603 searches. Data last updated December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$132Average$198FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$177Average$314FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$197Average$339FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$249Average$405FlexibilityNo cancel feeOn-time63%

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