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$54+ 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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Cheap flight deals from Buffalo to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Illinois (USIL). 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 18, 2024.

Round-trip from

$138
(CheapOair)

One-way from

$54
(Frontier)
From Buffalo to Illinois
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One-way flight from Buffalo to Illinois
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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 December 18, 2024.

This American Airlines deal was found by Cheapflights users on 12/17. 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.
Tue 12/247:11 amBUF - ORD
Nonstop1h 56mAmerican Airlines
Tue 12/315:40 pmORD - BUF
Nonstop1h 41mAmerican Airlines
Deal found 12/17$289
This Southwest deal was found by Cheapflights users on 12/17. 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.
Tue 12/246:50 pmBUF - MDW
Nonstop1h 45mSouthwest
Tue 12/316:30 pmMDW - BUF
Nonstop1h 25mSouthwest
Deal found 12/17$290
This Delta deal was found by Cheapflights users on 12/17. 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.
Tue 12/2411:55 amBUF - MDW
1 stop5h 15mDelta
Tue 12/315:51 pmMDW - BUF
1 stop4h 12mDelta
Deal found 12/17$308
This Delta deal was found by Cheapflights users on 12/17. 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.
Tue 12/2411:55 amBUF - ORD
1 stop5h 45mDelta
Tue 12/315:30 pmORD - BUF
1 stop4h 33mDelta
Deal found 12/17$308
This Southwest deal was found by Cheapflights users on 12/17. 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.
Tue 12/246:10 amBUF - ORD
1 stop8h 50mSouthwest
Tue 12/3111:25 amORD - BUF
2 stops8h 05mSouthwest
Deal found 12/17$313
This United deal was found by Cheapflights users on 12/17. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/245:25 pmBUF - STL
1 stop5h 20mUnited Airlines
Wed 1/81:02 pmSTL - BUF
1 stop7h 08mUnited Airlines
Deal found 12/17$361
This CheapOair deal was found by Cheapflights users on 12/17. 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.
Sat 12/218:47 pmBUF - MDW
1 stop23h 55mFrontier
Tue 12/244:08 pmMDW - BUF
1 stop23h 32mFrontier
Deal found 12/17$378
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Tue 12/245:25 pmBUF - ORD
Nonstop2h 09mUnited Airlines
Wed 12/252:02 pmORD - BUF
Nonstop1h 42mUnited Airlines
Deal found 12/17$379
This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/256:05 amBUF - STL
1 stop7h 04mDelta
Sun 12/296:29 amSTL - BUF
1 stop3h 46mDelta
Deal found 12/16$406
This Southwest deal was found by Cheapflights users on 12/16. 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 12/257:45 amBUF - STL
2 stops8h 25mSouthwest
Sun 12/296:20 pmSTL - BUF
1 stop3h 35mSouthwest
Deal found 12/16$467
This CheapOair deal was found by Cheapflights users on 12/17. 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.
Sat 12/217:15 amBUF - ORD
1 stop7h 49mFrontier
Sun 12/227:29 pmORD - BUF
1 stop14h 27mFrontier
Deal found 12/17$468
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/267:11 amBUF - STL
1 stop5h 01mAmerican Airlines
Sat 12/285:58 pmSTL - BUF
1 stop5h 41mAmerican Airlines
Deal found 12/17$516

Find flights from Buffalo to Illinois within your budget

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 December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 1/10

9:06 am-11:27 pm

1 stop15h 21m

Lambert-St Louis

Sun 1/12

8:12 am-9:40 am

1 stop24h 28m

$138

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 1/24

1:38 pm-8:57 pm

1 stop8h 19m

Chicago O'Hare Intl

Sun 1/26

4:18 pm-9:41 am

1 stop16h 23m

$234

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 2/4

7:54 am-8:54 am

Nonstop2h 00m

Chicago O'Hare Intl

Tue 2/4

5:45 pm-8:24 pm

Nonstop1h 39m

$237

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Mon 2/24

11:24 am-7:29 pm

1 stop9h 05m

Chicago Midway

Tue 2/25

8:30 am-10:24 am

1 stop24h 54m

$238

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Tue 2/4

8:20 am-4:15 pm

1 stop8h 55m

Chicago Midway

Tue 2/4

6:25 pm-8:55 pm

Nonstop1h 30m

$242

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 1/9

4:03 pm-3:44 pm

1 stop24h 41m

Chicago O'Hare Intl

Mon 1/13

9:05 am-3:08 pm

1 stop5h 03m

$244

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 2/4

5:40 pm-6:49 pm

Nonstop2h 09m

Chicago O'Hare Intl

Thu 2/6

6:30 pm-9:10 pm

Nonstop1h 40m

$252

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 2/4

6:15 am-2:00 pm

1 stop8h 45m

Chicago O'Hare Intl

Tue 2/4

4:35 pm-10:20 pm

1 stop4h 45m

$256

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Sat 1/18

6:00 am-1:46 pm

1 stop8h 46m

Chicago O'Hare Intl

Mon 1/27

10:05 am-7:19 pm

1 stop8h 14m

$283

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 1/15

10:59 am-4:53 pm

1 stop6h 54m

Lambert-St Louis

Wed 1/22

6:05 am-1:38 pm

1 stop6h 33m

$286

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 31 results
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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.

Travel insights for flights from Buffalo to Illinois

Get recent, data-driven insights about flights from Buffalo to Illinois including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $232). Flying from Buffalo to Illinois in June is currently the most expensive (average of $308). 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 December 18, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Buffalo to Illinois as you normally would.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 December 18, 2024.
Get a feel of what it's like to fly with American Airlines, Delta and Southwest from Buffalo to Illinois by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,848 reviews

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,279 reviews
Southwest
8.1
Very good
4,848 reviews

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,848 reviews

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $54. Users have also found prices from $93 and $119 on JetBlue and United Airlines, 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 Republic Airways (100%), GoJet (95%) or Copa Airlines (92%) 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 $123. On average you can expect to pay $1,163. The most popular route, (Buffalo - Chicago O'Hare Intl), can usually be booked for $152.

  • 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, September is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $232). Flying from Buffalo to Illinois in June is currently the most expensive (average of $308). 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.

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Top 6 airlines flying from Buffalo to Illinois

Discover the top 6 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$95Average$193FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$152Average$402FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$171Average$317FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$175Average$190FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$247Average$315FlexibilityNo cancel feeOn-time63%
DeltaCheapest$256Average$457FlexibilityNo cancel feeOn-timeN/A
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