HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$55+ Cheap flights from Buffalo (BUF) to Illinois

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Buffalo to Illinois 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.

Cheap flight deals from Buffalo to Illinois

Keep the following information in mind while searching for Buffalo to Illinois flight deals. Data was last updated October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$153
(JetBlue)

One-way from

$55
(Priceline)

Popular in

February

Cheapest in

August

Average price

$301

Good round-trip deal

$322 or less

Good one-way deal

$179 or less
Provider with most accurate pricing for Buffalo-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Buffalo-Chicago (CHI) flights.
Search Deals
From Buffalo to Illinois
Search Deals
One-way flight from Buffalo to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Buffalo to Illinois.
Search Deals
Price to beat on a one-way flight from Buffalo to Illinois.
Search Deals

Find flight deals from Buffalo to Illinois

Cheapest flights from Buffalo to Illinois
Explore the most affordable flight options available from Buffalo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This Justfly.com deal was found by Cheapflights users on 10/28. 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 11/138:54 pmBUF - MDW
1 stop21h 03mFrontier
Sun 11/166:15 amMDW - BUF
1 stop6h 32mFrontier
Deal found 10/28$154
This Justfly.com deal was found by Cheapflights users on 10/28. 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 11/131:04 pmBUF - ORD
1 stop11h 24mFrontier
Sun 11/165:01 amORD - BUF
1 stop7h 46mFrontier
Deal found 10/28$154
This Frontier deal was found by Cheapflights users on 10/27. 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 11/131:04 pmBUF - ORD
1 stop11h 24mFrontier
Fri 11/141:50 pmORD - BUF
1 stop6h 18mFrontier
Deal found 10/27$169
This Frontier deal was found by Cheapflights users on 10/28. 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 12/63:18 pmBUF - STL
1 stop8h 15mFrontier
Fri 12/123:30 pmSTL - BUF
1 stop21h 45mFrontier
Deal found 10/28$171
This Frontier deal was found by Cheapflights users on 10/27. 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 11/79:53 pmBUF - MDW
1 stop13h 33mFrontier
Sun 11/910:12 amMDW - BUF
1 stop6h 52mFrontier
Deal found 10/27$176
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Fri 11/79:53 pmBUF - ORD
1 stop18h 15mFrontier
Sun 11/95:01 amORD - BUF
1 stop7h 46mFrontier
Deal found 10/28$176
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Sun 11/912:39 pmBUF - ORD
1 stop11h 49mFrontier
Mon 11/101:50 pmORD - BUF
1 stop6h 18mFrontier
Deal found 10/29$177
This Priceline deal was found by Cheapflights users on 10/27. 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.
Sun 12/76:05 amBUF - ORD
1 stop5h 30mJetBlue
Wed 12/107:00 amORD - BUF
1 stop7h 59mJetBlue
Deal found 10/27$181
This Frontier deal was found by Cheapflights users on 10/27. 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 11/149:53 pmBUF - MDW
1 stop13h 33mFrontier
Mon 11/176:15 amMDW - BUF
1 stop6h 22mFrontier
Deal found 10/27$183
This Frontier deal was found by Cheapflights users on 10/29. 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 11/142:42 pmBUF - ORD
1 stop10h 29mFrontier
Sat 11/158:00 amORD - BUF
1 stop9h 17mFrontier
Deal found 10/29$183
This Priceline deal was found by Cheapflights users on 10/27. 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 11/186:00 amBUF - ORD
1 stop5h 35mJetBlue
Thu 11/201:43 pmORD - BUF
1 stop7h 08mJetBlue
Deal found 10/27$189
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/2111:52 amBUF - MDW
1 stop12h 37mFrontier
Mon 11/245:47 pmMDW - BUF
1 stop23h 05mFrontier
Deal found 10/27$194

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Illinois 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 October 29, 2025.
Use the filters below to find and compare flights from Buffalo to Illinois that are best for you.

Fly from

Buffalo

Fly to

Illinois

Route

Depart

Return

Price

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 1/20

7:00 am-1:10 pm

1 stop7h 10m

Chicago O'Hare Intl

Tue 2/10

2:05 pm-11:55 pm

1 stop8h 50m

$153

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 11/14

9:53 pm-3:08 pm

1 stop18h 15m

Chicago O'Hare Intl

Mon 11/17

1:50 pm-9:08 pm

1 stop6h 18m

$154

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 1/8

2:45 pm-7:45 pm

1 stop6h 00m

Chicago O'Hare Intl

Mon 1/12

2:05 pm-11:55 pm

1 stop8h 50m

$155

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 12/6

3:18 pm-10:33 pm

1 stop8h 15m

Lambert-St Louis

Fri 12/12

3:30 pm-2:15 pm

1 stop21h 45m

$171

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Sun 11/9

12:39 pm-11:28 pm

1 stop11h 49m

Chicago O'Hare Intl

Mon 11/10

1:50 pm-9:08 pm

1 stop6h 18m

$177

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Wed 1/7

7:00 am-1:10 pm

1 stop7h 10m

Chicago O'Hare Intl

Fri 1/9

10:45 am-6:50 pm

1 stop7h 05m

$181

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 11/18

6:00 am-10:35 am

1 stop5h 35m

Chicago O'Hare Intl

Thu 11/20

1:43 pm-9:51 pm

1 stop7h 08m

$189

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 12/5

11:30 am-10:24 pm

1 stop11h 54m

Chicago O'Hare Intl

Sat 12/6

4:47 pm-2:23 pm

2 stops20h 36m

$200

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 12/8

3:18 pm-10:33 pm

1 stop8h 15m

Lambert-St Louis

Thu 12/11

3:30 pm-11:51 am

1 stop19h 21m

$201

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 11/7

9:53 pm-3:38 pm

1 stop18h 45m

Lambert-St Louis

Sun 11/9

5:12 pm-11:44 am

1 stop17h 32m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Buffalo to Illinois

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

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

Currently, July is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $77). Flying from Buffalo to Illinois in January is currently the most expensive (average of $232). 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 IL?

Find hourly flight availability from Buffalo to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 30% on flights from Buffalo to Illinois by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Buffalo to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Buffalo to Illinois flight should consider departing on Monday evenings 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.

How much does it cost to fly round-trip from Buffalo to Illinois?

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated October 29, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Buffalo to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,240 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
9,001 reviews
Southwest
8.0
Very good
4,240 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
11,032 reviews
Southwest
8.0
Very good
4,240 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
3,124 reviews
Southwest
8.0
Very good
4,240 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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 Illinois. 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 Illinois?

    Most people fly from Buffalo (BUF) if they book a flight from Buffalo to Illinois. Buffalo is conveniently located just 8.3 mi from Buffalo’s city center.

  • How long is the flight from Buffalo to Illinois?

    For as low as $249, JetBlue can have you in Illinois from Buffalo in 4h 57m. The distance between Buffalo and Illinois is about 611 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $77. Users have also found prices from $124 and $129 on American Airlines and Delta, respectively.

  • What are the most popular routes from Buffalo to Illinois?

    When deciding which route to take from Buffalo to Illinois consider Buffalo - Chicago O'Hare Intl, Buffalo - Chicago Midway or Buffalo - Lambert-St Louis as they are the most popular.

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

    Consider SkyWest Airlines (100%), Republic Airways (100%) or Copa Airlines (93%) when booking your flight. These represent the most reliable airlines when flying from Buffalo to Illinois.

  • What are the cheapest flights from Buffalo to Illinois?

    The cheapest flight price from Buffalo to Illinois is $131. On average you can expect to pay $892. The most popular route, (Buffalo - Chicago O'Hare Intl), can usually be booked for $146.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $77). Flying from Buffalo to Illinois in January is currently the most expensive (average of $232). 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

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 Illinois

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Miami flights
John F Kennedy Intl to Orlando flights
John F Kennedy Intl to Los Angeles flights
Newark to Miami flights
Newark to Fort Lauderdale flights
LaGuardia to Dallas/Fort Worth flights
LaGuardia to Fort Lauderdale flights
LaGuardia to Miami flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to O'Hare Intl flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to West Palm Beach flights
Newark to Orlando flights
Newark to West Palm Beach flights
Newark to Los Angeles flights
LaGuardia to Orlando flights
John F Kennedy Intl to Tampa flights
LaGuardia to Hobby flights
Newark to Las Vegas flights
Newark to San Francisco flights
Newark to Tampa flights
Newark to Hobby flights
John F Kennedy Intl to Atlanta flights
LaGuardia to Tampa flights
John F Kennedy Intl to Hobby flights
LaGuardia to Los Angeles flights
John F Kennedy Intl to Sky Harbor Intl flights
John F Kennedy Intl to Denver flights
John F Kennedy Intl to New Orleans flights
LaGuardia to Atlanta flights
Newark to New Orleans flights
Newark to Sky Harbor Intl flights
LaGuardia to O'Hare Intl flights
Newark to O'Hare Intl flights
John F Kennedy Intl to Seattle flights
LaGuardia to New Orleans flights
LaGuardia to Las Vegas flights
Newark to Atlanta flights
John F Kennedy Intl to Austin flights
LaGuardia to West Palm Beach flights
Newark to George Bush Intcntl flights
LaGuardia to San Francisco flights
Newark to Denver flights
John F Kennedy Intl to George Bush Intcntl flights
John F Kennedy Intl to Nashville flights
LaGuardia to George Bush Intcntl flights
LaGuardia to Denver flights

Top 4 airlines flying from Buffalo to Illinois

Discover the top 4 airlines that operate flights from Buffalo to Illinois. 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$198FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$161Average$327FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$175Average$378FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$259Average$340FlexibilityNo 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.