HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buffalo

$89+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUF
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 31, 2025.

Round-trip from

$185
(FlightHub)

One-way from

$89
(Southwest)

Popular in

January

Cheapest in

August

Average price

$338

Good round-trip deal

$188 or less

Good one-way deal

$152 or less
From Illinois to Buffalo
Search Deals
One-way flight from Illinois to Buffalo
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

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 July 31, 2025.

This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/237:46 pmORD - BUF
1 stop13h 31mFrontier
Sat 9/67:11 pmBUF - ORD
1 stop25h 33mFrontier
Deal found 7/30$185
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/178:33 amORD - BUF
Nonstop1h 33mAmerican Airlines
Thu 9/187:30 amBUF - ORD
Nonstop1h 55mAmerican Airlines
Deal found 7/30$186
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/261:15 pmMDW - BUF
Nonstop1h 30mSouthwest
Wed 8/277:40 amBUF - MDW
1 stop5h 05mSouthwest
Deal found 7/29$187
This Delta deal was found by Cheapflights users on 7/31. 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.
Sat 8/236:17 pmMDW - BUF
1 stop3h 42mDelta
Tue 8/266:20 amBUF - MDW
1 stop3h 15mDelta
Deal found 7/31$197
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:00 amORD - BUF
1 stop6h 39mDelta
Wed 9/312:45 pmBUF - ORD
1 stop4h 28mDelta
Deal found 7/30$197
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:40 pmSTL - BUF
1 stop14h 12mFrontier
Sat 8/237:05 pmBUF - STL
1 stop19h 02mFrontier
Deal found 7/30$205
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2310:51 amMDW - BUF
1 stop22h 26mFrontier
Mon 8/254:55 pmBUF - MDW
1 stop8h 29mFrontier
Deal found 7/30$207
This Trip.com deal was found by Cheapflights users on 7/29. 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.
Sat 9/138:00 amORD - BUF
1 stop9h 14mMultiple Airlines
Sat 9/2010:55 amBUF - ORD
Nonstop1h 56mMultiple Airlines
Deal found 7/29$214
This JetBlue deal was found by Cheapflights users on 7/31. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:45 amORD - BUF
1 stop7h 12mJetBlue
Fri 9/193:55 pmBUF - ORD
1 stop5h 53mJetBlue
Deal found 7/31$220
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:48 pmSTL - BUF
1 stop5h 48mAmerican Airlines
Tue 11/1812:56 pmBUF - STL
1 stop4h 40mAmerican Airlines
Deal found 7/31$237
This United Airlines deal was found by Cheapflights users on 7/30. 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 10/47:20 amORD - BUF
Nonstop1h 43mUnited Airlines
Tue 10/1410:55 amBUF - ORD
Nonstop1h 56mUnited Airlines
Deal found 7/30$237
This Southwest deal was found by Cheapflights users on 7/30. 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 9/101:35 pmSTL - BUF
2 stops7h 35mSouthwest
Fri 9/126:10 amBUF - STL
1 stop3h 30mSouthwest
Deal found 7/30$242

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 July 31, 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

Sat 8/23

7:46 pm-10:17 am

1 stop13h 31m

Buffalo

Sat 9/6

7:11 pm-7:44 pm

1 stop25h 33m

$185

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 9/17

8:33 am-11:06 am

Nonstop1h 33m

Buffalo

Thu 9/18

7:30 am-8:25 am

Nonstop1h 55m

$186

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Tue 8/26

1:15 pm-3:45 pm

Nonstop1h 30m

Buffalo

Wed 8/27

7:40 am-11:45 am

1 stop5h 05m

$187

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Sat 8/23

6:17 pm-10:59 pm

1 stop3h 42m

Buffalo

Tue 8/26

6:20 am-8:35 am

1 stop3h 15m

$197

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 8/27

6:00 am-1:39 pm

1 stop6h 39m

Buffalo

Wed 9/3

12:45 pm-4:13 pm

1 stop4h 28m

$197

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 8/16

5:40 pm-8:52 am

1 stop14h 12m

Buffalo

Sat 8/23

7:05 pm-1:07 pm

1 stop19h 02m

$205

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Sat 8/23

10:51 am-10:17 am

1 stop22h 26m

Buffalo

Mon 8/25

4:55 pm-12:24 am

1 stop8h 29m

$207

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Sat 9/13

8:00 am-6:14 pm

1 stop9h 14m

Buffalo

Sat 9/20

10:55 am-11:51 am

Nonstop1h 56m

$214

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 9/16

6:45 am-2:57 pm

1 stop7h 12m

Buffalo

Fri 9/19

3:55 pm-8:48 pm

1 stop5h 53m

$220

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Sat 10/4

7:20 am-10:03 am

Nonstop1h 43m

Buffalo

Tue 10/14

10:55 am-11:51 am

Nonstop1h 56m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 44 results
1
2
3
...
5

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 July 31, 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 July 31, 2025.

The most flights from USIL to BUF are scheduled on a Thursday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Reviews of airlines servicing Buffalo

Get insights into the airlines that provide service to Buffalo. 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 Buffalo. Reviews last updated July 31, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Illinois to Buffalo have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

  • 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 $89 on Southwest. Other airlines that offer cheap prices include Frontier from $89 and Delta from $99 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: GoJet (87%), Envoy Air (85%), Republic Airways( 82%).

  • What are the cheapest flights from Illinois to Buffalo?

    While on average a flight from Illinois to Buffalo is generally $264, our data shows the cheapest flight currently is $98. When looking at the most popular route, (Chicago O'Hare Intl - Buffalo), you can expect to pay $177 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
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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 for Illinois to Buffalo

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to LaGuardia flights
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
San Francisco to John F Kennedy Intl flights
O'Hare Intl to LaGuardia flights
O'Hare Intl to John F Kennedy Intl flights
O'Hare Intl to Newark flights
Atlanta to John F Kennedy Intl flights
Fort Lauderdale to Newark flights
Dallas/Fort Worth to Newark flights
Los Angeles to LaGuardia flights
San Francisco to Newark flights
Atlanta to LaGuardia flights
Dallas/Fort Worth to John F Kennedy Intl flights
Hobby to LaGuardia flights
Ontario to John F Kennedy Intl flights
Atlanta to Newark flights
Miami to John F Kennedy Intl flights
Fort Lauderdale to LaGuardia flights
Miami to Newark flights
Seattle to John F Kennedy Intl flights
Miami to LaGuardia flights
San Francisco to LaGuardia flights
Orlando to John F Kennedy Intl flights
Hobby to John F Kennedy Intl flights
Fort Lauderdale to John F Kennedy Intl flights
Burbank to Newark flights
Orlando to Newark flights
Seattle to Newark flights
Ontario to Newark flights
Orlando to LaGuardia flights
Minneapolis to LaGuardia flights
Tampa to Newark flights
Santa Ana to Newark flights
Tampa to John F Kennedy Intl flights
Hobby to Newark flights
George Bush Intcntl to John F Kennedy Intl flights
West Palm Beach to John F Kennedy Intl flights
Seattle to LaGuardia flights
Midway to LaGuardia flights
George Bush Intcntl to LaGuardia flights
Tampa to LaGuardia flights
San Diego to John F Kennedy Intl flights
San Diego to Newark flights
Midway to Newark flights
Santa Ana to LaGuardia flights
Detroit to John F Kennedy Intl flights
Detroit to Newark flights
Boston to LaGuardia flights
Boston to Newark flights

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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$198FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$159Average$326FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$198Average$331FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$260Average$367FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.