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$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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
ene. 21 — ene. 281
mar. 1/21
mar. 1/28
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 enero 16, 2025.

Round-trip from

$136
(Trip.com)

One-way from

$55
(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 enero 16, 2025.

This Trip.com deal was found by Cheapflights users on 1/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 1/304:07 pmBUF - STL
1 stop8h 24mFrontier
vie. 1/315:05 pmSTL - BUF
1 stop15h 54mFrontier
Deal found 1/16$136
This FlightHub deal was found by Cheapflights users on 1/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 2/98:17 pmBUF - MDW
1 stop19h 45mFrontier
dom. 2/1612:43 pmMDW - BUF
1 stop20h 41mFrontier
Deal found 1/16$240
This JetBlue deal was found by Cheapflights users on 1/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/47:05 amBUF - ORD
1 stop6h 22mJetBlue
mié. 4/91:22 pmORD - BUF
1 stop7h 38mJetBlue
Deal found 1/16$243
This eDestinos deal was found by Cheapflights users on 1/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/12:47 pmBUF - ORD
2 stops15h 18mFrontier
sáb. 3/88:00 amORD - BUF
1 stop10h 04mFrontier
Deal found 1/15$259
This American Airlines deal was found by Cheapflights users on 1/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/227:45 amBUF - ORD
Nonstop2h 01mAmerican Airlines
mar. 2/256:15 amORD - BUF
1 stop8h 09mAmerican Airlines
Deal found 1/16$281
This Delta deal was found by Cheapflights users on 1/16. 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.
mié. 4/210:30 amBUF - ORD
1 stop13h 13mDelta
mar. 4/87:35 amORD - BUF
1 stop10h 44mDelta
Deal found 1/16$283
This Gotogate deal was found by Cheapflights users on 1/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/1911:40 amBUF - ORD
1 stop8h 31mSun Country Air
dom. 7/68:10 pmORD - BUF
1 stop13h 34mSun Country Air
Deal found 1/14$285
This Southwest deal was found by Cheapflights users on 1/16. 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.
sáb. 2/226:15 amBUF - MDW
Nonstop1h 55mSouthwest
lun. 2/247:05 pmMDW - BUF
Nonstop1h 30mSouthwest
Deal found 1/16$295
This Delta deal was found by Cheapflights users on 1/16. 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.
mar. 4/19:00 amBUF - MDW
1 stop4h 36mDelta
mar. 4/86:42 pmMDW - BUF
1 stop3h 15mDelta
Deal found 1/16$317
This Southwest deal was found by Cheapflights users on 1/16. 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.
sáb. 2/225:35 amBUF - ORD
2 stops10h 45mSouthwest
lun. 2/2411:25 amORD - BUF
1 stop4h 30mSouthwest
Deal found 1/16$320
This Delta deal was found by Cheapflights users on 1/15. 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.
dom. 2/166:00 amBUF - STL
1 stop4h 36mDelta
mar. 2/186:00 amSTL - BUF
1 stop4h 18mDelta
Deal found 1/15$322
This United Airlines deal was found by Cheapflights users on 1/15. 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.
mié. 3/127:00 amBUF - ORD
Nonstop2h 02mUnited Airlines
dom. 3/166:29 pmORD - BUF
Nonstop1h 40mUnited Airlines
Deal found 1/15$323

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 enero 16, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

jue. 1/30

4:07 pm-11:31 pm

1 stop8h 24m

Lambert-St Louis

vie. 1/31

5:05 pm-9:59 am

1 stop15h 54m

$136

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

dom. 2/9

8:17 pm-3:02 pm

1 stop19h 45m

Chicago Midway

dom. 2/16

12:43 pm-10:24 am

1 stop20h 41m

$240

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

vie. 4/4

7:05 am-12:27 pm

1 stop6h 22m

Chicago O'Hare Intl

mié. 4/9

1:22 pm-10:00 pm

1 stop7h 38m

$243

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

sáb. 3/1

2:47 pm-5:05 am

2 stops15h 18m

Chicago O'Hare Intl

sáb. 3/8

8:00 am-7:04 pm

1 stop10h 04m

$259

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

sáb. 2/22

7:45 am-8:46 am

Nonstop2h 01m

Chicago O'Hare Intl

mar. 2/25

6:15 am-3:24 pm

1 stop8h 09m

$281

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

mié. 4/2

6:00 am-10:43 pm

1 stop17h 43m

Chicago O'Hare Intl

dom. 4/6

6:00 am-10:38 pm

1 stop15h 38m

$283

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

sáb. 2/22

6:15 am-7:10 am

Nonstop1h 55m

Chicago Midway

lun. 2/24

7:05 pm-9:35 pm

Nonstop1h 30m

$295

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

mar. 4/1

9:00 am-12:36 pm

1 stop4h 36m

Chicago Midway

mar. 4/8

6:42 pm-10:57 pm

1 stop3h 15m

$317

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

sáb. 2/22

5:35 am-3:20 pm

2 stops10h 45m

Chicago O'Hare Intl

lun. 2/24

11:25 am-4:55 pm

1 stop4h 30m

$320

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

dom. 2/16

6:00 am-9:36 am

1 stop4h 36m

Lambert-St Louis

mar. 2/18

6:00 am-11:18 am

1 stop4h 18m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 25 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, August is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $245). Flying from Buffalo to Illinois in March is currently the most expensive (average of $320). 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 enero 16, 2025.

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.

Weekly flight availability from Buffalo to Illinois

Explore weekly flight availability from Buffalo to Illinois. 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 enero 16, 2025.

The most flights from BUF to USIL are scheduled on a Friday (23 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).

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 enero 16, 2025.
Get a feel of what it's like to fly with United Airlines, Frontier 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
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

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
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

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
8,511 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

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
3,199 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

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
8,964 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

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
4,659 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

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 $55. Users have also found prices from $94 and $117 on JetBlue and American 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 Gulf Air (87%), Copa Airlines (85%) or Avianca (82%) 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 $142. On average you can expect to pay $1,093. The most popular route, (Buffalo - Chicago O'Hare Intl), can usually be booked for $213.

  • 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, August is the cheapest month in which you can book a flight from Buffalo to Illinois (average of $245). Flying from Buffalo to Illinois in March is currently the most expensive (average of $320). 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

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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 enero 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$95Average$193FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$154Average$403FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$169Average$320FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$175Average$201FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$247Average$315FlexibilityNo cancel feeOn-time63%
DeltaCheapest$256Average$457FlexibilityNo cancel feeOn-timeN/A
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