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O'Hare Intl

$70+ Cheap flights from Buffalo (BUF) to O'Hare Intl (ORD)

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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
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Find cheap flights from Buffalo to O'Hare Intl with Cheapflights

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Cheapflights Tip: The best prices from Buffalo to Chicago O'Hare Intl are usually found in January or August, booked 71 days in advance, depart on a Friday or Saturday and return on a Tuesday

Cheap flight deals from Buffalo to O'Hare Intl

Cheapest flights from Buffalo to O'Hare Intl
Explore the most affordable flight options available from Buffalo to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2026.

This Frontier deal was found by Cheapflights users on 4/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:49 pm
BUF
-
ORD
1 stop6h 02m
Frontier
Wed 5/136:55 am
ORD
-
BUF
1 stop5h 59m
Frontier
Deal found 4/12$140
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:36 am
BUF
-
ORD
1 stop9h 15m
Frontier
Tue 5/261:50 pm
ORD
-
BUF
1 stop23h 04m
Frontier
Deal found 4/12$145
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 4/2312:35 pm
BUF
-
ORD
1 stop11h 04m
Frontier
Tue 4/286:08 pm
ORD
-
BUF
1 stop17h 34m
Frontier
Deal found 4/13$171
This Frontier deal was found by Cheapflights users on 4/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:49 pm
BUF
-
ORD
1 stop5h 52m
Frontier
Wed 6/36:55 am
ORD
-
BUF
1 stop5h 59m
Frontier
Deal found 4/12$180
This Expedia deal was found by Cheapflights users on 4/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:49 pm
BUF
-
ORD
1 stop6h 02m
Frontier
Sun 5/108:39 am
ORD
-
BUF
1 stop10h 25m
Frontier
Deal found 4/12$181
This Kiwi.com deal was found by Cheapflights users on 4/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/301:08 pm
BUF
-
ORD
1 stop10h 31m
Frontier
Mon 5/44:28 pm
ORD
-
BUF
1 stop17h 13m
Frontier
Deal found 4/11$184
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1411:35 am
BUF
-
ORD
1 stop9h 20m
Multiple Airlines
Sat 8/16:00 am
ORD
-
BUF
1 stop27h 40m
Multiple Airlines
Deal found 4/12$186
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 4/2312:35 pm
BUF
-
ORD
1 stop11h 04m
Multiple Airlines
Tue 4/287:15 pm
ORD
-
BUF
2 stops16h 27m
Multiple Airlines
Deal found 4/13$192
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/132:50 pm
BUF
-
ORD
1 stop18h 13m
Frontier
Wed 7/226:55 am
ORD
-
BUF
1 stop6h 00m
Frontier
Deal found 4/12$196
This Frontier deal was found by Cheapflights users on 4/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:36 am
BUF
-
ORD
1 stop9h 05m
Frontier
Mon 6/16:55 am
ORD
-
BUF
1 stop5h 59m
Frontier
Deal found 4/12$201
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1411:35 am
BUF
-
ORD
1 stop9h 20m
Multiple Airlines
Mon 7/276:00 am
ORD
-
BUF
1 stop6h 55m
Multiple Airlines
Deal found 4/12$202

Find flight deals from Buffalo to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to O'Hare Intl (ORD). 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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Frontier)

One-way from

$70
(Frontier)

Popular in

April

Cheapest in

January

Average price

$403

Good round-trip deal

$366 or less

Good one-way deal

$209 or less
Provider with most accurate pricing for Buffalo-Chicago O'Hare Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Buffalo-Chicago O'Hare Intl flights.
Search Deals
From Buffalo to Chicago O'Hare Intl
Search Deals
One-way flight from Buffalo to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Buffalo to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from Buffalo to Chicago O'Hare Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to O'Hare Intl 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, 2026.
Use the filters below to find and compare flights from Buffalo to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 8/27

7:40 pm-11:57 pm

1 stop5h 17m

Chicago O'Hare Intl

Mon 8/31

11:30 am-6:57 pm

1 stop6h 27m

$245

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Sat 5/2

5:17 pm-11:59 pm

1 stop7h 42m

Chicago O'Hare Intl

Wed 5/6

6:00 am-1:54 pm

1 stop6h 54m

$245

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Mon 5/4

8:50 am-12:50 pm

1 stop5h 00m

Chicago O'Hare Intl

Tue 5/5

2:00 pm-9:45 pm

1 stop6h 45m

$271

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 6/18

7:27 pm-11:59 pm

1 stop5h 32m

Chicago O'Hare Intl

Sun 6/21

7:17 pm-12:02 am

1 stop3h 45m

$278

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Sat 5/23

7:00 am-7:59 am

Nonstop1h 59m

Chicago O'Hare Intl

Mon 5/25

2:00 pm-4:46 pm

Nonstop1h 46m

$307
Quickest round-trip

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 5/5

5:50 pm-6:47 pm

Nonstop1h 57m

Chicago O'Hare Intl

Wed 5/6

2:13 pm-4:54 pm

Nonstop1h 41m

$309

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 8/7

6:00 am-12:34 pm

1 stop7h 34m

Chicago O'Hare Intl

Sun 8/9

7:17 pm-11:58 pm

1 stop3h 41m

$310

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 9/4

4:30 pm-9:20 pm

1 stop5h 50m

Chicago O'Hare Intl

Mon 9/7

11:30 am-6:57 pm

1 stop6h 27m

$320

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 8/6

7:19 pm-11:53 pm

1 stop5h 34m

Chicago O'Hare Intl

Sun 8/9

7:17 pm-11:58 pm

1 stop3h 41m

$327

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 7/24

5:52 pm-6:51 pm

Nonstop1h 59m

Chicago O'Hare Intl

Mon 7/27

5:55 pm-8:41 pm

Nonstop1h 46m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Buffalo to O'Hare Intl

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 Buffalo to O'Hare Intl in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 Buffalo-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Buffalo-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Buffalo-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Buffalo-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Buffalo-Chicago O'Hare Intl Airport 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 Buffalo to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Buffalo 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 Buffalo to Chicago O'Hare Intl Airport

How far ahead should I book a flight from Buffalo to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to O'Hare Intl. Price data was last updated on April 10, 2026.

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Buffalo to Chicago O'Hare Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Buffalo to Chicago O'Hare Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Buffalo to Chicago O'Hare Intl Airport (average of $236). Flying from Buffalo to Chicago O'Hare Intl Airport in April is currently the most expensive (average of $403). 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 BUF to ORD?

Find hourly flight availability from Buffalo to O'Hare Intl. 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, 2026.

It’s optimal to fly from Buffalo to Chicago O'Hare Intl Airport in the morning. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight at noon.

How much does it cost to fly round-trip from Buffalo to Chicago O'Hare Intl Airport?

The best insider tips for Buffalo to Chicago O'Hare Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Buffalo to Chicago O'Hare Intl Airport trip
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on Qatar Airways

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated April 17, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andFrontier from Buffalo to Chicago O'Hare Intl Airport. 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.
United Airlines
7.4
Good
9,602 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,602 reviews
United Airlines
7.4
Good
9,602 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
American Airlines
7.1
Good
11,593 reviews
United Airlines
7.4
Good
9,602 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Frontier
5.7
Fair
2,987 reviews
United Airlines
7.4
Good
9,602 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Buffalo to O'Hare Intl. 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 from for flights from Buffalo to Chicago O'Hare Intl?

    For a flight from Buffalo to Chicago O'Hare Intl, you will be flying from Buffalo. Buffalo (BUF) is just 8.3 mi from the center of the city. Buffalo is the only Buffalo airport and it handles 29 outbound flights to Chicago O'Hare Intl per day. 3 airlines have flights to Chicago O'Hare Intl from Buffalo on a regular basis.

  • How long is the flight from Buffalo to Chicago O'Hare Intl Airport?

    Departing from Buffalo to Chicago O'Hare Intl Airport will take you 1h 59m. The distance from Buffalo to Chicago O'Hare Intl Airport is about 472 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Buffalo to Chicago O'Hare Intl Airport round-trip?

    Frontier, at $92, was found to be the cheapest airline from Buffalo to Chicago O'Hare Intl Airport.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Frontier is currently priced 70% below the average price you’ll pay for this route.

  • What are the most reliable airlines from Buffalo to Chicago O'Hare Intl Airport?

    Before booking your flight to Chicago O'Hare Intl Airport from Buffalo, check out the most reliable airlines to get you to your destination on time: SWISS (82%), Copa Airlines (82%), Japan Airlines( 78%).

  • What are the cheapest flights from Buffalo to Chicago O'Hare Intl Airport?

    The cheapest flight price from Buffalo to Chicago O'Hare Intl Airport is $134. On average you can expect to pay $901. The most popular route, (Buffalo - Chicago O'Hare Intl), can usually be booked for $154.

  • Can I find deals for flights from Buffalo to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Buffalo to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to O'Hare Intl?

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

  • Can I find deals for business class flights from Buffalo to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Buffalo to O'Hare Intl 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 Buffalo to Chicago O'Hare Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Buffalo to Chicago O'Hare Intl Airport (average of $236). Flying from Buffalo to Chicago O'Hare Intl Airport in April is currently the most expensive (average of $403). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Rosemont
Schaumburg
Lake Geneva
Gurnee
Naperville
Delavan
Downers Grove
Oakbrook Terrace
Des Plaines
Hoffman Estates
Oak Brook
South Holland
Libertyville
Benton Harbor
Elk Grove Village
Elgin
Warrenville
Bridgeview
Great Lakes
Lansing

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Top 3 airlines flying from Buffalo to O'Hare Intl

Discover the top 3 airlines that operate flights from Buffalo to O'Hare Intl. 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, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$92Average$200FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$145Average$317FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$145Average$311FlexibilityNo cancel feeOn-time71%

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