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$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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$198
(Delta)

One-way from

$89
(Delta)

Popular in

January

Cheapest in

August

Average price

$314

Good round-trip deal

$249 or less

Good one-way deal

$80 or less
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. 14% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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 9/115:00 amORD - BUF
1 stop5h 00mAmerican Airlines
Mon 9/1511:54 amBUF - ORD
Nonstop1h 54mAmerican Airlines
Deal found 6/11$197
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2610:11 amMDW - BUF
1 stop4h 54mDelta
Sat 8/306:20 amBUF - MDW
1 stop3h 15mDelta
Deal found 6/11$198
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:00 amORD - BUF
1 stop6h 39mDelta
Sat 8/3012:02 pmBUF - ORD
1 stop8h 17mDelta
Deal found 6/11$198
This United Airlines deal was found by Cheapflights users on 6/11. 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 9/47:10 amORD - BUF
Nonstop1h 43mUnited Airlines
Mon 9/85:54 pmBUF - ORD
Nonstop1h 56mUnited Airlines
Deal found 6/11$200
This Southwest deal was found by Cheapflights users on 6/11. 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 8/69:55 amMDW - BUF
Nonstop1h 35mSouthwest
Fri 8/812:35 pmBUF - MDW
Nonstop1h 35mSouthwest
Deal found 6/11$202
This JetBlue deal was found by Cheapflights users on 6/11. 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.
Thu 9/111:36 pmORD - BUF
1 stop4h 44mJetBlue
Mon 9/156:00 amBUF - ORD
1 stop7h 10mJetBlue
Deal found 6/11$210
This American Airlines deal was found by Cheapflights users on 6/12. 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 9/247:23 amSTL - BUF
1 stop8h 27mAmerican Airlines
Wed 10/111:54 amBUF - STL
1 stop10h 59mAmerican Airlines
Deal found 6/12$213
This Southwest deal was found by Cheapflights users on 6/10. 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 10/21:50 pmORD - BUF
1 stop5h 55mSouthwest
Sun 10/56:00 amBUF - ORD
1 stop6h 50mSouthwest
Deal found 6/10$221
This Delta deal was found by Cheapflights users on 6/11. 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 6/3011:17 amSTL - BUF
1 stop6h 27mDelta
Fri 7/411:12 amBUF - STL
1 stop7h 53mDelta
Deal found 6/11$237
This American Airlines deal was found by Cheapflights users on 6/12. 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 11/14:38 pmPIA - BUF
1 stop6h 28mAmerican Airlines
Sat 11/811:43 amBUF - PIA
1 stop5h 04mAmerican Airlines
Deal found 6/12$249
This American Airlines deal was found by Cheapflights users on 6/10. 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 8/14:22 pmMLI - BUF
1 stop7h 10mAmerican Airlines
Mon 8/45:05 amBUF - MLI
1 stop6h 50mAmerican Airlines
Deal found 6/10$249
This Sun Country Air deal was found by Cheapflights users on 6/10. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/26:15 pmORD - BUF
1 stop15h 05mSun Country Air
Sun 7/611:41 amBUF - ORD
1 stop25h 58mSun Country Air
Deal found 6/10$255

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 June 12, 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

MDW - BUF

MDWBUF

Chicago Midway

Tue 8/26

10:11 am-4:05 pm

1 stop4h 54m

Buffalo

Sat 8/30

6:20 am-8:35 am

1 stop3h 15m

$198

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 8/26

6:00 am-1:39 pm

1 stop6h 39m

Buffalo

Sat 8/30

12:02 pm-7:19 pm

1 stop8h 17m

$198

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 9/4

7:10 am-9:53 am

Nonstop1h 43m

Buffalo

Mon 9/8

5:54 pm-6:50 pm

Nonstop1h 56m

$200

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Wed 8/6

9:55 am-12:30 pm

Nonstop1h 35m

Buffalo

Fri 8/8

12:35 pm-1:10 pm

Nonstop1h 35m

$202

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Mon 7/28

6:25 pm-12:32 am

1 stop5h 07m

Buffalo

Tue 8/5

5:05 am-5:57 am

Nonstop1h 52m

$202

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 9/24

7:23 am-4:50 pm

1 stop8h 27m

Buffalo

Wed 10/1

11:54 am-9:53 pm

1 stop10h 59m

$213

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Fri 9/5

1:36 pm-7:20 pm

1 stop4h 44m

Buffalo

Sun 9/7

6:00 am-12:10 pm

1 stop7h 10m

$222

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Mon 6/30

11:17 am-6:44 pm

1 stop6h 27m

Buffalo

Fri 7/4

11:12 am-6:05 pm

1 stop7h 53m

$237

PeoriaBuffalo

PIA - BUF

PIABUF

Greater Peoria

Sat 11/1

4:38 pm-12:06 am

1 stop6h 28m

Buffalo

Sat 11/8

11:43 am-3:47 pm

1 stop5h 04m

$249

MolineBuffalo

MLI - BUF

MLIBUF

Moline Quad-City

Fri 8/1

4:22 pm-12:32 am

1 stop7h 10m

Buffalo

Mon 8/4

5:05 am-10:55 am

1 stop6h 50m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 44 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 June 12, 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 June 12, 2025.

The most flights from USIL to BUF are scheduled on a Wednesday (36 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Buffalo by month

Plan your trip to Buffalo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Buffalo ranges from 2.5 - 4.0 inches per month. November is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Buffalo when rainfall is around 2.5 in.

Temperature in Buffalo by month

Plan your trip to Buffalo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Buffalo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

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 June 12, 2025.
To help decide which airline to fly from Illinois to Buffalo, see what other customers have to say about Southwest, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,946 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 Delta. Other airlines that offer cheap prices include Southwest from $100 and American Airlines from $100 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: SkyWest Airlines (100%), Royal Jordanian (96%), Japan Airlines( 93%).

  • What are the cheapest flights from Illinois to Buffalo?

    While on average a flight from Illinois to Buffalo is generally $268, our data shows the cheapest flight currently is $124. 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, 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 Illinois?

Book flights to Illinois if you plan to visit one of these locations
Williamsville
Amherst
Orchard Park
Batavia
Eden
Cheektowaga
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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$101Average$190FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$164Average$325FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$198Average$372FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$260Average$366FlexibilityNo cancel feeOn-time63%

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