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$70+ Cheap flights from Chicago (CHI) 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUF
Jan 23 — Jan 301
Fri 1/23
Fri 1/30
1 adult, Economy
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Find cheap flights from Chicago 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

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Cheapflights Tip: The best prices from Chicago to Buffalo are usually found in September or August, booked 72 days in advance, depart on a Tuesday or Monday and return on a Friday

Cheap flight deals from Chicago to Buffalo

Cheapest flights from Chicago to Buffalo
Explore the most affordable flight options available from Chicago to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 24, 2025.

This Priceline deal was found by Cheapflights users on 12/24. 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 Priceline 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
Fri 1/25:40 pmBUF - MDW
1 stop5h 32mFrontier
Deal found 12/24$347
This Frontier deal was found by Cheapflights users on 12/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:10 amORD - BUF
1 stop11h 00mFrontier
Wed 12/315:44 pmBUF - ORD
1 stop5h 40mFrontier
Deal found 12/22$362
This Priceline deal was found by Cheapflights users on 12/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:15 amMDW - BUF
1 stop7h 30mFrontier
Mon 1/55:45 pmBUF - MDW
1 stop5h 27mFrontier
Deal found 12/24$372
This Priceline deal was found by Cheapflights users on 12/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 amORD - BUF
1 stop9h 45mFrontier
Mon 1/55:45 pmBUF - ORD
1 stop5h 39mFrontier
Deal found 12/24$372
This Frontier deal was found by Cheapflights users on 12/23. 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.
Wed 12/316:05 amORD - BUF
1 stop9h 44mFrontier
Fri 1/25:40 pmBUF - ORD
1 stop5h 44mFrontier
Deal found 12/23$393
This United Airlines deal was found by Cheapflights users on 12/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:04 pmORD - BUF
Nonstop1h 50mUnited Airlines
Wed 12/315:35 pmBUF - ORD
Nonstop2h 15mUnited Airlines
Deal found 12/22$442
This Priceline deal was found by Cheapflights users on 12/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:14 pmORD - BUF
1 stop4h 59mMultiple Airlines
Sat 12/2711:04 amBUF - ORD
1 stop9h 16mMultiple Airlines
Deal found 12/21$500
This American Airlines deal was found by Cheapflights users on 12/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:50 amORD - BUF
Nonstop1h 38mAmerican Airlines
Thu 1/16:02 amBUF - ORD
Nonstop2h 18mAmerican Airlines
Deal found 12/24$501
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amORD - BUF
1 stop3h 21mDelta
Wed 12/315:52 pmBUF - ORD
1 stop3h 44mDelta
Deal found 12/22$540
This Kiwi.com deal was found by Cheapflights users on 12/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 amORD - BUF
1 stop9h 45mFrontier
Wed 12/315:44 pmBUF - ORD
2 stops26h 37mFrontier
Deal found 12/22$558
This United Airlines deal was found by Cheapflights users on 12/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:02 pmORD - BUF
Nonstop1h 52mUnited Airlines
Wed 12/317:48 pmBUF - ORD
1 stop4h 56mUnited Airlines
Deal found 12/22$589
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:00 amORD - BUF
1 stop4h 36mDelta
Thu 1/112:01 pmBUF - ORD
1 stop6h 21mDelta
Deal found 12/24$599

Find flight deals from Chicago to Buffalo

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Buffalo (BUF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$162
(Frontier)

One-way from

$70
(Expedia)

Popular in

January

Cheapest in

September

Average price

$399

Good round-trip deal

$292 or less

Good one-way deal

$150 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 Chicago (CHI) to Buffalo
Search Deals
One-way flight from Chicago (CHI) to Buffalo
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 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 Chicago (CHI) to Buffalo.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Buffalo.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago 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 24, 2025.
Use the filters below to find and compare flights from Chicago to Buffalo that are best for you.

Fly from

Chicago

Fly to

Buffalo

Route

Depart

Return

Price

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Thu 2/5

6:20 am-12:44 pm

1 stop5h 24m

Buffalo

Thu 2/12

1:39 pm-10:34 pm

1 stop9h 55m

$162

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 2/19

5:05 am-12:54 pm

1 stop6h 49m

Buffalo

Tue 2/24

6:00 am-11:59 am

1 stop6h 59m

$167

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 2/24

12:41 pm-6:33 pm

1 stop4h 52m

Buffalo

Thu 2/26

6:00 am-11:48 am

1 stop6h 48m

$171

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 1/29

7:45 am-2:30 pm

1 stop5h 45m

Buffalo

Sat 1/31

10:00 am-5:43 pm

1 stop8h 43m

$171

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Sun 1/11

7:45 am-2:30 pm

1 stop5h 45m

Buffalo

Sat 1/17

10:00 am-5:43 pm

1 stop8h 43m

$171

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Mon 2/23

6:04 am-2:02 pm

1 stop6h 58m

Buffalo

Thu 2/26

6:00 am-11:54 am

1 stop6h 54m

$172

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 2/18

6:04 am-2:02 pm

1 stop6h 58m

Buffalo

Mon 2/23

3:05 pm-11:21 pm

1 stop9h 16m

$185

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 2/19

6:04 am-2:17 pm

1 stop7h 13m

Buffalo

Wed 2/25

6:00 am-12:04 pm

1 stop7h 04m

$194

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 2/25

12:41 pm-6:33 pm

1 stop4h 52m

Buffalo

Sat 2/28

6:00 am-11:58 am

1 stop6h 58m

$223

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Sat 1/17

4:29 pm-7:16 pm

Nonstop1h 47m

Buffalo

Sun 1/18

7:30 am-8:53 am

Nonstop2h 23m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 33 results
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Compare providers for flights from Chicago to Buffalo

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Buffalo in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-Buffalo flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago-Buffalo flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago-Buffalo flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Buffalo flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Buffalo flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Chicago to Buffalo

Have a flexible travel schedule? Discover the best time to fly to Buffalo from Chicago 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 Chicago to Buffalo

How far ahead should I book a flight from Chicago to Buffalo?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Buffalo. Price data was last updated on December 19, 2025.

The best time to book flights from Chicago to Buffalo is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Chicago to Buffalo (average of $98). Flying from Chicago to Buffalo in March is currently the most expensive (average of $238). 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 CHI to BUF?

Find hourly flight availability from Chicago 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 24, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 11% on flights from Chicago to Buffalo by exploring options for tickets in the evening.

What is the cheapest day to fly from Chicago to Buffalo?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Buffalo. Price data was last updated on December 20, 2025.

Travelers seeking maximum savings on their Chicago 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 Chicago to Buffalo

Explore weekly flight availability from Chicago 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 24, 2025.

The most flights from CHI to BUF are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 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 December 24, 2025.
Read through reviews of airlines operating flights from Chicago to Buffalo, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,255 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,255 reviews
Southwest
8.0
Very good
4,255 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,111 reviews
Southwest
8.0
Very good
4,255 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
8.0
Very good
4,255 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,073 reviews
Southwest
8.0
Very good
4,255 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 Chicago?

    Located just 8.3 mi from the city center, Buffalo is the airport most travelers will use when flying to Buffalo from Chicago. Booking flights from Chicago to Buffalo (BUF) should be relatively easy as there are 15 daily inbound flights from Chicago from 4 different airlines.

  • How long is the flight from Chicago to Buffalo?

    Frontier, JetBlue, and Southwest can get you from Chicago to Buffalo in just under 4h 52m. Your travel time can differ by up to 32m. There are 472 mi between Chicago and Buffalo. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Chicago to Buffalo round-trip?

    Flying on Frontier is currently your cheapest option to Buffalo, with prices starting at $132. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $177 and $197, respectively. Frontier is currently priced 60% below the average price you’ll pay for this route.

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

    $110 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $118 and $124, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to Buffalo on time: Envoy Air (79%), Japan Airlines (77%), Alaska Airlines (76%).

  • What are the cheapest flights from Chicago to Buffalo?

    On average you can expect to pay $288 for a flight from Chicago to Buffalo. The cheapest flight overall is $63 while the most popular route, (Chicago O'Hare Intl - Buffalo) is currently priced at $171.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Chicago 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 Chicago to Buffalo?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Buffalo (average of $98). Flying from Chicago to Buffalo in March is currently the most expensive (average of $238). 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
Batavia
Williamsville
Orchard Park
Eden
Amherst
West Seneca

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Chicago to Buffalo

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to John F Kennedy Intl flights
O'Hare Intl to LaGuardia flights
O'Hare Intl to Newark flights
Midway to Newark flights
Midway to LaGuardia flights
Midway to John F Kennedy Intl flights
St. Louis to LaGuardia flights
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St. Louis to John F Kennedy Intl flights
O'Hare Intl to Rochester flights
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O'Hare Intl to White Plains flights
Midway to Albany flights
Midway to Buffalo flights
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Midway to White Plains flights
Moline to Newark flights
Moline to LaGuardia flights
Peoria to LaGuardia flights
O'Hare Intl to Islip flights
St. Louis to Buffalo flights
Evansville to John F Kennedy Intl flights
Moline to John F Kennedy Intl flights
Evansville to Newark flights
Midway to Syracuse flights
Peoria to Newark flights
St. Louis to Albany flights
Evansville to LaGuardia flights
O'Hare Intl to Stewart flights
Peoria to John F Kennedy Intl flights
St. Louis to Syracuse flights
O'Hare Intl to Binghamton flights
St. Louis to Rochester flights
Bloomington to John F Kennedy Intl flights
Bloomington to Newark flights
St. Louis to White Plains flights
Dubuque to Rochester flights
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Peoria to Buffalo flights
Moline to Albany flights
O'Hare Intl to Rutland flights
Champaign to John F Kennedy Intl flights
Peoria to Rochester flights
O'Hare Intl to Ithaca flights
Champaign to LaGuardia flights
O'Hare Intl to Elmira flights
Moline to Stewart flights

Top 4 airlines flying from Chicago to Buffalo

Discover the top 4 airlines that operate flights from Chicago 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 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$132Average$198FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$177Average$304FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$197Average$364FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$278Average$405FlexibilityNo cancel feeOn-time63%

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