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$85+ 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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUF
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$160
(Frontier)

One-way from

$85
(Gotogate)

Popular in

January

Cheapest in

August

Average price

$345

Good round-trip deal

$294 or less

Good one-way deal

$142 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 ($54 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 April 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 April 17, 2025.

This Frontier deal was found by Cheapflights users on 4/17. 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.
Fri 5/169:00 amORD - BUF
1 stop9h 48mFrontier
Sat 5/1711:38 amBUF - ORD
1 stop12h 54mFrontier
Deal found 4/17$160
This Mytrip deal was found by Cheapflights users on 4/16. 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 5/81:19 pmMDW - BUF
1 stop18h 42mFrontier
Sun 5/119:51 amBUF - MDW
1 stop8h 39mFrontier
Deal found 4/16$165
This Mytrip deal was found by Cheapflights users on 4/16. 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.
Sat 5/35:45 pmSTL - BUF
1 stop23h 43mFrontier
Mon 5/59:51 amBUF - STL
1 stop15h 15mFrontier
Deal found 4/16$193
This JetBlue deal was found by Cheapflights users on 4/17. 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.
Fri 5/304:03 pmORD - BUF
1 stop4h 51mJetBlue
Sun 6/110:33 amBUF - ORD
1 stop5h 31mJetBlue
Deal found 4/17$207
This American Airlines deal was found by Cheapflights users on 4/16. 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 6/277:20 amSTL - BUF
1 stop3h 46mAmerican Airlines
Wed 7/210:09 amBUF - STL
1 stop6h 42mAmerican Airlines
Deal found 4/16$244
This American Airlines deal was found by Cheapflights users on 4/17. 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 5/144:25 pmMLI - BUF
1 stop6h 49mAmerican Airlines
Sun 5/185:10 amBUF - MLI
1 stop6h 32mAmerican Airlines
Deal found 4/17$249
This Southwest deal was found by Cheapflights users on 4/17. 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 6/105:45 pmSTL - BUF
1 stop5h 35mSouthwest
Tue 6/177:15 pmBUF - STL
1 stop4h 40mSouthwest
Deal found 4/17$251
This American Airlines deal was found by Cheapflights users on 4/17. 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 5/212:45 pmORD - BUF
Nonstop1h 39mAmerican Airlines
Sat 5/243:00 pmBUF - ORD
Nonstop1h 53mAmerican Airlines
Deal found 4/17$251
This Delta deal was found by Cheapflights users on 4/17. 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 6/75:15 pmMLI - BUF
1 stop5h 41mDelta
Tue 6/102:16 pmBUF - MLI
2 stops9h 31mDelta
Deal found 4/17$254
This Southwest deal was found by Cheapflights users on 4/16. 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 5/221:10 pmMDW - BUF
Nonstop1h 25mSouthwest
Thu 5/297:30 pmBUF - MDW
Nonstop1h 35mSouthwest
Deal found 4/16$267
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/86:35 pmORD - BUF
Nonstop1h 47mUnited Airlines
Sun 5/116:45 amBUF - ORD
Nonstop1h 58mUnited Airlines
Deal found 4/17$269
This Delta deal was found by Cheapflights users on 4/17. 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 5/216:00 amORD - BUF
1 stop7h 19mDelta
Sat 5/2412:20 pmBUF - ORD
1 stop7h 28mDelta
Deal found 4/17$271

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 April 17, 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

Fri 5/16

9:00 am-7:48 pm

1 stop9h 48m

Buffalo

Sat 5/17

11:38 am-11:32 pm

1 stop12h 54m

$160

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Thu 5/8

1:19 pm-9:01 am

1 stop18h 42m

Buffalo

Sun 5/11

9:51 am-5:30 pm

1 stop8h 39m

$165

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 5/3

5:45 pm-6:28 pm

1 stop23h 43m

Buffalo

Mon 5/5

9:51 am-12:06 am

1 stop15h 15m

$193

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Fri 5/30

4:03 pm-9:54 pm

1 stop4h 51m

Buffalo

Sun 6/1

10:33 am-3:04 pm

1 stop5h 31m

$207

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 6/27

7:20 am-12:06 pm

1 stop3h 46m

Buffalo

Wed 7/2

10:09 am-3:51 pm

1 stop6h 42m

$244

MolineBuffalo

MLI - BUF

MLIBUF

Moline Quad-City

Wed 5/14

4:25 pm-12:14 am

1 stop6h 49m

Buffalo

Sun 5/18

5:10 am-10:42 am

1 stop6h 32m

$249

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Tue 6/10

5:45 pm-12:20 am

1 stop5h 35m

Buffalo

Tue 6/17

7:15 pm-10:55 pm

1 stop4h 40m

$251

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 5/21

2:45 pm-5:24 pm

Nonstop1h 39m

Buffalo

Sat 5/24

3:00 pm-3:53 pm

Nonstop1h 53m

$251

MolineBuffalo

MLI - BUF

MLIBUF

Moline Quad-City

Sat 6/7

5:15 pm-11:56 pm

1 stop5h 41m

Buffalo

Tue 6/10

2:16 pm-10:47 pm

2 stops9h 31m

$254

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Thu 5/22

1:10 pm-3:35 pm

Nonstop1h 25m

Buffalo

Thu 5/29

7:30 pm-8:05 pm

Nonstop1h 35m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 42 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 April 17, 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 April 17, 2025.

The most flights from USIL to BUF are scheduled on a Wednesday (34 on average). You will have fewer flight options on Saturday, 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 April 17, 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
4,280 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,916 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,667 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,926 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 $85 on Frontier. Other airlines that offer cheap prices include JetBlue from $114 and Southwest 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: SkyWest Airlines (100%), Republic Airways (97%), Copa Airlines( 94%).

  • What are the cheapest flights from Illinois to Buffalo?

    While on average a flight from Illinois to Buffalo is generally $290, our data shows the cheapest flight currently is $134. When looking at the most popular route, (Chicago O'Hare Intl - Buffalo), you can expect to pay $190 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
West Seneca
Williamsville
Amherst
Batavia
Orchard Park
Cheektowaga

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Alternative routes for Illinois to Buffalo

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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$101Average$174FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$166Average$327FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$198Average$360FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$225Average$355FlexibilityNo cancel feeOn-time63%

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