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$90+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUF
oct. 25 — nov. 11
sáb. 10/25
sáb. 11/1
1 adult, Economy
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Cheap flight deals from Illinois to Buffalo

Keep the following information in mind while searching for Illinois to Buffalo flight deals. Data was last updated septiembre 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$155
(Booking.com)

One-way from

$90
(Frontier)

Popular in

January

Cheapest in

August

Average price

$329

Good round-trip deal

$243 or less

Good one-way deal

$195 or less
Provider with most accurate pricing for Chicago (CHI)-Buffalo flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Buffalo flights.
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From Illinois to Buffalo
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One-way flight from Illinois to Buffalo
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Highest demand for flights based on searches. 13% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to Buffalo.
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Price to beat on a one-way flight from Illinois to Buffalo.
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Find 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 septiembre 25, 2025.

This Booking.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/2411:11 amSTL - BUF
1 stop23h 25mFrontier
vie. 10/319:38 pmBUF - STL
1 stop19h 00mFrontier
Deal found 9/24$155
This Booking.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/166:07 pmORD - BUF
1 stop25h 11mFrontier
dom. 10/199:13 pmBUF - ORD
1 stop21h 00mFrontier
Deal found 9/24$158
This Booking.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/11:37 pmMDW - BUF
1 stop24h 10mFrontier
dom. 11/26:59 pmBUF - MDW
1 stop14h 33mFrontier
Deal found 9/22$161
This Mytrip deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/85:45 pmORD - BUF
1 stop19h 02mFrontier
sáb. 11/157:12 pmBUF - ORD
1 stop18h 14mFrontier
Deal found 9/23$161
This Mytrip deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” 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.
sáb. 10/188:30 amORD - BUF
1 stop8h 27mFrontier
lun. 10/2012:15 pmBUF - ORD
1 stop12h 24mFrontier
Deal found 9/24$163
This Booking.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/176:50 amORD - BUF
1 stop8h 39mFrontier
dom. 10/199:13 pmBUF - ORD
1 stop21h 00mFrontier
Deal found 9/24$170
This Booking.com deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/39:48 amMDW - BUF
1 stop7h 26mFrontier
dom. 10/54:57 pmBUF - MDW
1 stop23h 56mFrontier
Deal found 9/25$172
This Booking.com deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/39:32 pmSTL - BUF
1 stop19h 42mFrontier
lun. 10/205:24 pmBUF - STL
1 stop16h 43mFrontier
Deal found 9/25$174
This Booking.com deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/265:20 amMDW - BUF
1 stop6h 15mFrontier
lun. 10/2712:15 pmBUF - MDW
1 stop24h 23mFrontier
Deal found 9/25$174
This Frontier deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/178:44 amORD - BUF
1 stop10h 34mFrontier
lun. 10/2012:15 pmBUF - ORD
1 stop12h 24mFrontier
Deal found 9/23$175
This Booking.com deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/143:27 pmMDW - BUF
1 stop25h 50mFrontier
dom. 11/166:59 pmBUF - MDW
1 stop14h 33mFrontier
Deal found 9/24$178
This Frontier deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” 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.
jue. 10/211:36 amORD - BUF
1 stop6h 10mFrontier
vie. 10/312:17 pmBUF - ORD
1 stop12h 22mFrontier
Deal found 9/24$187

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 septiembre 25, 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

sáb. 11/8

5:45 pm-1:47 pm

1 stop19h 02m

Buffalo

sáb. 11/15

7:12 pm-12:26 pm

1 stop18h 14m

$161

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

vie. 11/14

3:27 pm-6:17 pm

1 stop25h 50m

Buffalo

dom. 11/16

6:59 pm-8:32 am

1 stop14h 33m

$178

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

mié. 10/22

10:08 am-5:51 pm

1 stop6h 43m

Buffalo

mié. 10/29

12:30 pm-5:55 pm

1 stop6h 25m

$195

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

vie. 10/17

5:28 pm-5:57 pm

1 stop23h 29m

Buffalo

lun. 10/20

12:15 pm-1:38 pm

1 stop26h 23m

$196

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

mar. 10/21

1:36 pm-10:00 pm

1 stop7h 24m

Buffalo

mié. 10/22

6:00 am-12:22 pm

1 stop7h 22m

$203

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

vie. 2/6

2:05 pm-11:55 pm

1 stop8h 50m

Buffalo

lun. 2/9

7:00 am-1:10 pm

1 stop7h 10m

$211

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

jue. 1/15

2:05 pm-11:55 pm

1 stop8h 50m

Buffalo

jue. 1/22

10:00 am-5:44 pm

1 stop8h 44m

$211

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

vie. 10/24

6:42 pm-11:36 am

2 stops15h 54m

Buffalo

vie. 10/31

12:29 pm-3:38 pm

2 stops28h 09m

$216

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

mar. 10/21

6:45 am-2:59 pm

1 stop7h 14m

Buffalo

jue. 10/23

6:00 am-12:23 pm

1 stop7h 23m

$220

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

vie. 10/24

7:52 pm-11:36 am

2 stops14h 44m

Buffalo

dom. 10/26

6:51 pm-9:07 am

2 stops15h 16m

$221

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

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, January is the cheapest month in which you can book a flight from Illinois to Buffalo (average of $256). Flying from Illinois to Buffalo in December is currently the most expensive (average of $337). 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 septiembre 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Buffalo as you normally would.

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 septiembre 25, 2025.

The most flights from USIL to BUF are scheduled on a Thursday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 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 4h 32m. Frontier provides one of the quickest options available for as low as $249. There are 585 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 $102 on JetBlue. Other airlines that offer cheap prices include Frontier from $106 and American Airlines from $125 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: Republic Airways (100%), SkyWest Airlines (83%), GoJet( 80%).

  • What are the cheapest flights from Illinois to Buffalo?

    While on average a flight from Illinois to Buffalo is generally $388, our data shows the cheapest flight currently is $149. When looking at the most popular route, (Chicago O'Hare Intl - Buffalo), you can expect to pay $144 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, January is the cheapest month in which you can book a flight from Illinois to Buffalo (average of $256). Flying from Illinois to Buffalo in December is currently the most expensive (average of $337). 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
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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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 septiembre 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$132Average$202FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$177Average$331FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$341FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$278Average$405FlexibilityNo cancel feeOn-time63%

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