HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$87+ Cheap flights from Buffalo (BUF) to Chicago (CHI)

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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — CHI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Buffalo to Chicago 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 are usually found in August or September, booked 84 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Buffalo to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Chicago (CHI). 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 September 11, 2025.

Round-trip from

$164
(FlightHub)

One-way from

$87
(Southwest)

Popular in

February

Cheapest in

August

Average price

$284

Good round-trip deal

$269 or less

Good one-way deal

$167 or less
From Buffalo to Chicago (CHI)
Search Deals
One-way flight from Buffalo to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Buffalo to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Buffalo to Chicago (CHI).
Search Deals

Find flight deals from Buffalo to Chicago

Cheapest flights from Buffalo to Chicago
Explore the most affordable flight options available from Buffalo to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:59 pmBUF - MDW
1 stop15h 52mFrontier
Sun 9/2810:13 amMDW - BUF
1 stop6h 09mFrontier
Deal found 9/11$164
This Delta deal was found by Cheapflights users on 9/11. 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.
Thu 10/26:15 amBUF - MDW
1 stop3h 25mDelta
Mon 10/66:23 pmMDW - BUF
1 stop3h 29mDelta
Deal found 9/11$177
This Delta deal was found by Cheapflights users on 9/11. 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.
Sat 10/46:30 pmBUF - ORD
1 stop4h 04mDelta
Mon 10/65:51 pmORD - BUF
1 stop4h 48mDelta
Deal found 9/11$177
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/245:24 pmBUF - ORD
1 stop8h 35mFrontier
Mon 10/276:50 amORD - BUF
1 stop8h 39mFrontier
Deal found 9/11$178
This Southwest deal was found by Cheapflights users on 9/11. 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 10/225:30 amBUF - MDW
2 stops7h 35mSouthwest
Wed 10/2912:40 pmMDW - BUF
2 stops7h 50mSouthwest
Deal found 9/11$180
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:59 pmBUF - ORD
1 stop21h 18mFrontier
Sun 9/216:00 amORD - BUF
1 stop9h 02mFrontier
Deal found 9/10$183
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:57 pmBUF - ORD
1 stop8h 02mFrontier
Sun 9/2811:36 amORD - BUF
1 stop6h 10mFrontier
Deal found 9/10$185
This Frontier deal was found by Cheapflights users on 9/9. 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 9/2512:17 pmBUF - MDW
1 stop12h 03mFrontier
Mon 9/298:19 amMDW - BUF
1 stop8h 55mFrontier
Deal found 9/9$186
This American Airlines deal was found by Cheapflights users on 9/9. 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 10/226:14 amBUF - ORD
Nonstop1h 59mAmerican Airlines
Wed 10/297:00 amORD - BUF
1 stop9h 47mAmerican Airlines
Deal found 9/9$188
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/91:57 pmBUF - ORD
Nonstop1h 58mUnited Airlines
Sat 10/112:09 pmORD - BUF
Nonstop1h 44mUnited Airlines
Deal found 9/10$193
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/302:42 pmBUF - MDW
1 stop8h 21mFrontier
Sun 11/210:12 amMDW - BUF
1 stop6h 52mFrontier
Deal found 9/11$194
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/154:58 pmBUF - ORD
1 stop8h 01mFrontier
Fri 9/198:49 pmORD - BUF
1 stop20h 25mFrontier
Deal found 9/10$194

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Chicago 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 September 11, 2025.
Use the filters below to find and compare flights from Buffalo to Chicago that are best for you.

Fly from

Buffalo

Fly to

Chicago

Route

Depart

Return

Price

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Fri 9/26

6:59 pm-9:51 am

1 stop15h 52m

Chicago Midway

Sun 9/28

10:13 am-5:22 pm

1 stop6h 09m

$164

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Sun 11/2

5:20 am-7:40 am

1 stop3h 20m

Chicago Midway

Mon 11/3

6:23 pm-10:52 pm

1 stop3h 29m

$177

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Wed 10/8

6:20 am-8:40 am

1 stop3h 20m

Chicago Midway

Wed 10/15

6:23 pm-10:52 pm

1 stop3h 29m

$177

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Sat 10/4

6:15 am-8:40 am

1 stop3h 25m

Chicago Midway

Mon 10/6

6:23 pm-10:52 pm

1 stop3h 29m

$177

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 12/4

6:12 am-8:54 am

1 stop3h 42m

Chicago Midway

Sun 12/7

6:40 pm-10:57 pm

1 stop3h 17m

$177

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 10/2

6:15 am-8:40 am

1 stop3h 25m

Chicago Midway

Mon 10/6

5:04 pm-11:39 pm

1 stop5h 35m

$177

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Sun 10/5

6:15 am-8:40 am

1 stop3h 25m

Chicago Midway

Mon 10/6

6:23 pm-10:52 pm

1 stop3h 29m

$177

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 9/30

6:00 am-1:01 pm

1 stop8h 01m

Chicago O'Hare Intl

Thu 10/2

7:00 am-1:49 pm

1 stop5h 49m

$177

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 10/23

6:20 am-9:43 am

1 stop4h 23m

Chicago O'Hare Intl

Sun 10/26

5:20 am-11:01 am

1 stop4h 41m

$177

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 11/4

6:03 am-1:10 pm

1 stop8h 07m

Chicago O'Hare Intl

Wed 11/5

4:15 pm-11:39 pm

1 stop6h 24m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 45 results
1
2
3
...
5

Best time to book a flight from Buffalo to Chicago

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

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

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to Chicago. Price data was last updated on August 29, 2025.

The best time to book flights from Buffalo to Chicago is 84 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 Buffalo to Chicago?

Currently, August is the cheapest month in which you can book a flight from Buffalo to Chicago (average of $245). Flying from Buffalo to Chicago in March is currently the most expensive (average of $321). 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 CHI?

Find hourly flight availability from Buffalo to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s optimal to fly from Buffalo to Chicago in the evening. By choosing this option you can save up to 35% on the cost of your flight, compared to a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Buffalo to Chicago. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their Buffalo to Chicago flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Buffalo to Chicago

Explore weekly flight availability from Buffalo to Chicago. 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 September 11, 2025.

The most flights from BUF to CHI are scheduled on a Wednesday (32 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 on average).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Buffalo to Chicago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Buffalo to Chicago. 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?

    Located just 8.3 mi from the city center, Buffalo is the airport most travelers will use when flying to Chicago from Buffalo. Booking flights from Buffalo (BUF) to Chicago should be relatively easy as there are 29 daily outbound flights to Chicago from 4 different airlines.

  • How long is the flight from Buffalo to Chicago?

    There are many flights that can get you from Buffalo to Chicago in 3h 20m. Fly via Frontier or Delta to get the fastest option. Airlines will cover a distance of 466 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to Chicago, with prices starting at $58. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $157 and $161, respectively. Frontier is priced at 82% lower than the current average price of a flight leaving 3 months from now.

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

    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 Buffalo to Chicago on time: Avianca (90%), Copa Airlines (89%), ANA (83%).

  • What are the cheapest flights from Buffalo to Chicago?

    On average you can expect to pay $661 for a flight from Buffalo to Chicago. The cheapest flight overall is $91 while the most popular route, (Buffalo - Chicago O'Hare Intl) is currently priced at $117.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Buffalo to Chicago 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?

    Currently, August is the cheapest month in which you can book a flight from Buffalo to Chicago (average of $245). Flying from Buffalo to Chicago in March is currently the most expensive (average of $321). 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?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
Lansing
Hammond
Benton Harbor
Porter
Chesterton

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.

Alternative routes for Buffalo to Chicago

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

Top 4 airlines flying from Buffalo to Chicago

Discover the top 4 airlines that operate flights from Buffalo to Chicago. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$200FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$157Average$371FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$161Average$330FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$259Average$343FlexibilityNo cancel feeOn-time63%

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.