HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$96+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Buffalo to O'Hare Intl 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.
Cheapflights Tip: The best prices from Buffalo to Chicago O'Hare Intl are usually found in January or October, booked 43 days in advance, depart on a Saturday or Tuesday and return on a Saturday

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 July 24, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Fri 9/181:16 pm
BUF
-
ORD
1 stop23h 46m
Frontier
Mon 9/212:03 pm
ORD
-
BUF
1 stop21h 18m
Frontier
Deal found 7/22$254
This Expedia deal was found by Cheapflights users on 7/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/172:30 pm
BUF
-
ORD
1 stop5h 52m
Multiple Airlines
Sun 9/209:26 am
ORD
-
BUF
1 stop7h 08m
Multiple Airlines
Deal found 7/22$255
This Frontier deal was found by Cheapflights users on 7/19. 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 9/511:36 am
BUF
-
ORD
1 stop9h 32m
Frontier
Sun 9/67:44 pm
ORD
-
BUF
1 stop21h 25m
Frontier
Deal found 7/19$256
This American Airlines deal was found by Cheapflights users on 7/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:26 am
BUF
-
ORD
1 stop5h 49m
American Airlines
Tue 8/255:00 am
ORD
-
BUF
1 stop4h 18m
American Airlines
Deal found 7/23$257
This JetBlue deal was found by Cheapflights users on 7/21. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:00 am
BUF
-
ORD
1 stop7h 20m
JetBlue
Fri 10/302:15 pm
ORD
-
BUF
1 stop5h 09m
JetBlue
Deal found 7/21$258
This Frontier deal was found by Cheapflights users on 7/19. 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 9/181:16 pm
BUF
-
ORD
1 stop7h 28m
Frontier
Sun 9/209:26 am
ORD
-
BUF
1 stop7h 08m
Frontier
Deal found 7/19$260
This CheapOair deal was found by Cheapflights users on 7/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:36 am
BUF
-
ORD
1 stop9h 32m
Frontier
Sun 8/237:44 pm
ORD
-
BUF
1 stop21h 25m
Frontier
Deal found 7/23$262
This American Airlines deal was found by Cheapflights users on 7/20. 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 9/36:09 pm
BUF
-
ORD
Nonstop2h 18m
American Airlines
Sun 9/66:00 am
ORD
-
BUF
1 stop4h 29m
American Airlines
Deal found 7/20$263
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Fri 9/411:36 am
BUF
-
ORD
1 stop21h 17m
Frontier
Mon 9/79:10 pm
ORD
-
BUF
1 stop11h 13m
Frontier
Deal found 7/22$264
This CheapOair deal was found by Cheapflights users on 7/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:33 pm
BUF
-
ORD
1 stop26h 37m
Frontier
Sun 8/165:13 pm
ORD
-
BUF
1 stop24h 53m
Frontier
Deal found 7/21$265
This Justfly.com deal was found by Cheapflights users on 7/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:29 pm
BUF
-
ORD
1 stop16h 51m
Frontier
Sun 8/307:44 pm
ORD
-
BUF
1 stop21h 25m
Frontier
Deal found 7/19$266
This Trip.com deal was found by Cheapflights users on 7/20. 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.
Fri 9/46:54 pm
BUF
-
ORD
1 stop29h 14m
Frontier
Sat 9/124:49 pm
ORD
-
BUF
1 stop23h 45m
Frontier
Deal found 7/20$268

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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$254
(Kiwi.com)

One-way from

$96
(lol.travel)

Popular in

March

Cheapest in

January

Average price

$369

Good round-trip deal

$377 or less

Good one-way deal

$211 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. 5% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 24, 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

Fri 8/21

11:36 am-7:59 pm

1 stop9h 23m

Chicago O'Hare Intl

Fri 8/28

11:01 am-6:15 pm

1 stop6h 14m

$260

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Mon 9/14

6:55 am-7:55 am

Nonstop2h 00m

Chicago O'Hare Intl

Wed 9/16

6:29 am-9:08 am

Nonstop1h 39m

$269

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Mon 9/7

10:30 am-11:29 am

Nonstop1h 59m

Chicago O'Hare Intl

Mon 9/14

6:15 pm-9:07 pm

Nonstop1h 52m

$269

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Wed 9/9

7:00 am-8:00 am

Nonstop2h 00m

Chicago O'Hare Intl

Wed 9/16

6:15 pm-9:07 pm

Nonstop1h 52m

$307

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 8/25

10:30 am-11:29 am

Nonstop1h 59m

Chicago O'Hare Intl

Wed 8/26

6:15 pm-9:07 pm

Nonstop1h 52m

$307

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 9/1

5:58 pm-7:00 pm

Nonstop2h 02m

Chicago O'Hare Intl

Wed 9/2

6:49 am-9:28 am

Nonstop1h 39m

$308

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 9/11

5:58 pm-7:00 pm

Nonstop2h 02m

Chicago O'Hare Intl

Sun 9/13

6:15 pm-9:07 pm

Nonstop1h 52m

$323

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 8/27

6:55 am-7:55 am

Nonstop2h 00m

Chicago O'Hare Intl

Sun 8/30

2:07 pm-4:56 pm

Nonstop1h 49m

$329

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Sat 8/15

10:30 am-11:29 am

Nonstop1h 59m

Chicago O'Hare Intl

Sun 8/16

2:07 pm-4:56 pm

Nonstop1h 49m

$333

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 8/13

6:55 am-7:55 am

Nonstop2h 00m

Chicago O'Hare Intl

Sun 8/16

2:07 pm-4:56 pm

Nonstop1h 49m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

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 July.
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?

Booking 42 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 $241). Flying from Buffalo to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $381). 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 July 24, 2026.

It’s optimal to fly from Buffalo to Chicago O'Hare Intl Airport in the afternoon. By choosing this option you can save up to 25% 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?

Airfare is below average for this route at the moment.

Buffalo to Chicago O'Hare Intl Airport flights typically cost between $284 and $488 in September.
The cheapest round-trip price found within the last 5 days was $254 on Frontier (Sep 18-Sep 21).

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 July 24, 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
10,034 reviews

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
10,034 reviews
United Airlines
7.4
Good
10,034 reviews

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.1
Good
11,850 reviews
United Airlines
7.4
Good
10,034 reviews

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Frontier
5.6
Fair
2,771 reviews
United Airlines
7.4
Good
10,034 reviews

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 33 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 2h. The distance from Buffalo to Chicago O'Hare Intl Airport is about 472 mi. All flights are typically nonstop.

  • 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 American Airlines and United Airlines. Frontier is currently priced 72% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Buffalo to Chicago O'Hare Intl Airport one-way?

    $77 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on JetBlue and United Airlines, with prices starting from $98 and $118, respectively.

  • 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: Japan Airlines (93%), Copa Airlines (90%), SkyWest Airlines( 88%).

  • 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 $119. On average you can expect to pay $1,782. The most popular route, (Buffalo - Chicago O'Hare Intl), can usually be booked for $209.

  • 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 $241). Flying from Buffalo to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $381). 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
Benton Harbor
Rosemont
Schaumburg
Lake Geneva
Naperville
Oak Brook
Delavan
Oakbrook Terrace
Gurnee
South Holland
Libertyville
Orland Park
Hoffman Estates
Beloit
Downers Grove
Rockford
Racine
Great Lakes
Janesville
Joliet

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.

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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$92Average$202FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$145Average$344FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$232Average$351FlexibilityNo cancel feeOn-time69%

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.