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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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ORD
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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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 febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$151
(FlightHub)

One-way from

$55
(Frontier)

Popular in

February

Cheapest in

September

Average price

$405

Good round-trip deal

$386 or less

Good one-way deal

$186 or less
Provider with most accurate pricing for Buffalo-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Buffalo-Chicago (CHI) flights.
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From Buffalo to Illinois
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One-way flight from Buffalo to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Buffalo to Illinois.
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Price to beat on a 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 febrero 20, 2025.

This FlightHub deal was found by Cheapflights users on 2/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/35:30 pmBUF - STL
1 stop7h 16mFrontier
dom. 4/64:57 pmSTL - BUF
1 stop16h 31mFrontier
Deal found 2/19$151
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/67:00 amBUF - MLI
1 stop4h 19mUnited Airlines
lun. 3/103:50 pmMLI - BUF
1 stop4h 19mUnited Airlines
Deal found 2/19$259
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/66:00 amBUF - MLI
2 stops11h 25mDelta
lun. 3/105:03 pmMLI - BUF
1 stop6h 04mDelta
Deal found 2/19$264
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/306:00 amBUF - STL
1 stop9h 45mAmerican Airlines
mié. 5/712:03 pmSTL - BUF
1 stop9h 42mAmerican Airlines
Deal found 2/19$273
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/46:08 amBUF - ORD
1 stop8h 36mAmerican Airlines
vie. 3/78:05 amORD - BUF
Nonstop1h 42mAmerican Airlines
Deal found 2/19$275
This Southwest deal was found by Cheapflights users on 2/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/67:55 amBUF - MDW
Nonstop1h 50mSouthwest
lun. 3/109:30 pmMDW - BUF
Nonstop1h 25mSouthwest
Deal found 2/20$277
This Frontier deal was found by Cheapflights users on 2/19. 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.
jue. 2/272:59 pmBUF - ORD
1 stop8h 07mFrontier
dom. 3/25:05 amORD - BUF
1 stop11h 39mFrontier
Deal found 2/19$290
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/2810:15 amBUF - ORD
1 stop13h 31mDelta
mié. 11/57:00 amORD - BUF
1 stop10h 23mDelta
Deal found 2/20$295
This JetBlue deal was found by Cheapflights users on 2/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/811:37 amBUF - ORD
1 stop5h 28mJetBlue
mié. 3/1211:44 amORD - BUF
1 stop5h 24mJetBlue
Deal found 2/20$299
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/266:22 amBUF - MDW
1 stop3h 23mDelta
sáb. 3/291:12 pmMDW - BUF
1 stop2h 56mDelta
Deal found 2/20$307
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/222:47 pmBUF - MDW
1 stop8h 17mFrontier
lun. 2/242:41 pmMDW - BUF
1 stop25h 48mFrontier
Deal found 2/20$318
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/242:55 pmBUF - STL
1 stop7h 25mSouthwest
mar. 4/2912:50 pmSTL - BUF
2 stops8h 45mSouthwest
Deal found 2/19$342

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 febrero 20, 2025.

Fly from

Buffalo

Fly to

Illinois

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

jue. 4/3

5:30 pm-11:46 pm

1 stop7h 16m

Lambert-St Louis

dom. 4/6

4:57 pm-10:28 am

1 stop16h 31m

$151

BuffaloMoline

BUF - MLI

BUFMLI

Buffalo

jue. 3/6

7:00 am-10:19 am

1 stop4h 19m

Moline Quad-City

lun. 3/10

3:50 pm-9:09 pm

1 stop4h 19m

$259

BuffaloMoline

BUF - MLI

BUFMLI

Buffalo

jue. 3/6

6:00 am-4:25 pm

2 stops11h 25m

Moline Quad-City

lun. 3/10

5:03 pm-12:07 am

1 stop6h 04m

$264

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mié. 4/30

6:00 am-2:45 pm

1 stop9h 45m

Lambert-St Louis

mié. 5/7

12:03 pm-10:45 pm

1 stop9h 42m

$273

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

mar. 3/4

6:08 am-1:44 pm

1 stop8h 36m

Chicago O'Hare Intl

vie. 3/7

8:05 am-10:47 am

Nonstop1h 42m

$275

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

jue. 3/6

7:55 am-8:45 am

Nonstop1h 50m

Chicago Midway

lun. 3/10

9:30 pm-11:55 pm

Nonstop1h 25m

$277

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

vie. 4/4

5:09 pm-2:58 pm

1 stop22h 49m

Chicago O'Hare Intl

dom. 4/6

9:25 am-10:28 am

1 stop24h 03m

$296

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

sáb. 3/8

11:37 am-4:05 pm

1 stop5h 28m

Chicago O'Hare Intl

mié. 3/12

11:44 am-6:08 pm

1 stop5h 24m

$299

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

mié. 3/26

6:22 am-8:45 am

1 stop3h 23m

Chicago Midway

sáb. 3/29

1:12 pm-5:08 pm

1 stop2h 56m

$307

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

jue. 6/19

11:40 am-7:11 pm

1 stop8h 31m

Chicago O'Hare Intl

dom. 7/6

8:10 pm-10:44 am

1 stop13h 34m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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, 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 $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 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 febrero 20, 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 febrero 20, 2025.

The most flights from BUF to USIL are scheduled on a Thursday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 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 febrero 20, 2025.
Get a feel of what it's like to fly with Southwest, Delta and JetBlue 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
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 $123 on JetBlue and Sun Country Air, 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 Avianca (88%), Copa Airlines (85%) or Royal Jordanian (84%) 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 $138. On average you can expect to pay $1,218. The most popular route, (Buffalo - Chicago O'Hare Intl), can usually be booked for $158.

  • 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 $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.

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Top 5 airlines flying from Buffalo to Illinois

Discover the top 5 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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$95Average$193FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$152Average$407FlexibilityNo cancel feeOn-time69%
DeltaCheapest$156Average$505FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$172Average$323FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$247Average$339FlexibilityNo cancel feeOn-time63%
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