How many flights depart from Buffalo to Illinois on average per week?

As of March 2026, 151 flights take off from Buffalo and land in Illinois each week. The most common flight departure day for this route is Sun, with 19% of weekly flights taking off on this day.

What airlines fly to Illinois?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Illinois from Buffalo according to our data. American Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Buffalo to Illinois?

Southwest, Frontier, and Delta are the most popular carriers operating from Buffalo to Illinois

How many flights depart from Buffalo to Illinois on average per day?

21 flights are operational daily from Buffalo to Illinois as of March 2026. The most popular departure time for this route is 1:00PM, with 45% of flights per day taking off in the afternoon.

When did momondo last update prices for flights from Buffalo Airport to Illinois?

Prices for flights from Buffalo Airport to Illinois are updated daily.

How many operators does momondo search for flights from Buffalo Airport to Illinois?

As of March 2026, there are 5 operators available to choose from for flights from Buffalo Airport to Illinois.

How old do you have to be to fly from Buffalo Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Buffalo Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$76 Cheap Flights from Buffalo to Illinois in 2026

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Cheap round-trip flights

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12:35 pm - 7:31 pm

BUF

MDW

7h 56m

1 stop

7:34 pm - 11:09 am

MDW

BUF

14h 35m

1 stop

$155Frontier

Thu, Apr 23 - Sat, Apr 25

12:35 pm - 7:31 pm

BUF

MDW

7h 56m

1 stop

2:15 pm - 12:42 pm

MDW

BUF

21h 27m

1 stop

$156Frontier

Thu, Apr 16 - Mon, Apr 20

12:35 pm - 10:19 pm

BUF

MDW

10h 44m

1 stop

2:15 pm - 12:42 pm

MDW

BUF

21h 27m

1 stop

$158Frontier

Thu, Apr 16 - Mon, Apr 20

12:32 pm - 10:02 am

BUF

ORD

22h 30m

1 stop

6:08 pm - 12:12 pm

ORD

BUF

17h 04m

1 stop

$158Frontier

Mon, Apr 27 - Wed, Apr 29

1:08 pm - 2:20 pm

BUF

ORD

26h 12m

1 stop

4:28 pm - 12:13 pm

ORD

BUF

18h 45m

1 stop

$170Multiple Airlines

Fri, May 15 - Mon, May 18

6:00 am - 11:47 am

BUF

STL

6h 47m

1 stop

12:27 pm - 5:30 pm

STL

BUF

4h 03m

1 stop

$250American Airlines

Thu, Apr 9 - Tue, Apr 14

6:55 pm - 10:10 pm

BUF

STL

4h 15m

1 stop

10:25 am - 3:20 pm

STL

BUF

3h 55m

1 stop

$257Southwest

Tue, Apr 14 - Tue, Apr 21

9:45 am - 6:00 pm

BUF

STL

9h 15m

2 stops

7:35 am - 2:35 pm

STL

BUF

6h 00m

2 stops

$267Southwest

Tue, Apr 14 - Tue, Apr 21

5:29 pm - 9:07 pm

BUF

STL

4h 38m

1 stop

6:25 am - 1:17 pm

STL

BUF

5h 52m

1 stop

$277United Airlines

Wed, Mar 25 - Sat, Mar 28

7:00 am - 9:58 am

BUF

MLI

3h 58m

1 stop

6:30 am - 1:13 pm

MLI

BUF

5h 43m

1 stop

$339United Airlines

Sat, Apr 18 - Tue, Apr 21

American Airlines flights from Buffalo to Illinois

Our best American Airlines deals on Buffalo to Illinois flight tickets

American Airlines

May 5

BUF11:31 amBuffalo

2h 03m

ORD12:34 pmChicago O'Hare Intl

May 12

ORD11:45 amChicago O'Hare Intl

8h 35m

1 stop

BUF9:20 pmBuffalo

$231

American Airlines

May 2

BUF11:31 amBuffalo

2h 03m

ORD12:34 pmChicago O'Hare Intl

May 6

ORD11:45 amChicago O'Hare Intl

8h 35m

1 stop

BUF9:20 pmBuffalo

$239

American Airlines

Apr 16

BUF11:31 amBuffalo

2h 03m

ORD12:34 pmChicago O'Hare Intl

Apr 20

ORD7:05 amChicago O'Hare Intl

8h 27m

1 stop

BUF4:32 pmBuffalo

$240

United Airlines flights from Buffalo to Illinois

Our best United Airlines deals on Buffalo to Illinois flight tickets

United Airlines

Apr 15

BUF10:55 amBuffalo

2h 05m

ORD12:00 pmChicago O'Hare Intl

Apr 18

ORD10:30 amChicago O'Hare Intl

1h 43m

BUF1:13 pmBuffalo

$245

United Airlines

Apr 18

BUF7:00 amBuffalo

1h 57m

ORD7:57 amChicago O'Hare Intl

Apr 20

ORD2:33 pmChicago O'Hare Intl

1h 43m

BUF5:16 pmBuffalo

$260

United Airlines

Mar 25

BUF5:29 pmBuffalo

4h 38m

1 stop

STL9:07 pmLambert-St Louis

Mar 28

STL6:25 amLambert-St Louis

5h 52m

1 stop

BUF1:17 pmBuffalo

$277

Fly from

Fly to

Route

Depart

Return

Price

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 4/23

12:35 pm-7:31 pm

1 stop7h 56m

Chicago Midway

Sat 4/25

7:34 pm-11:09 am

1 stop14h 35m

$155

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 4/16

12:35 pm-7:31 pm

1 stop7h 56m

Chicago Midway

Mon 4/20

2:15 pm-12:42 pm

1 stop21h 27m

$156

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 4/16

12:35 pm-10:19 pm

1 stop10h 44m

Chicago Midway

Mon 4/20

2:15 pm-12:42 pm

1 stop21h 27m

$158

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Mon 4/27

12:32 pm-10:02 am

1 stop22h 30m

Chicago O'Hare Intl

Wed 4/29

6:08 pm-12:12 pm

1 stop17h 04m

$158

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Fri 5/15

1:08 pm-2:20 pm

1 stop26h 12m

Chicago O'Hare Intl

Mon 5/18

4:28 pm-12:13 pm

1 stop18h 45m

$170

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/9

6:00 am-11:47 am

1 stop6h 47m

Lambert-St Louis

Tue 4/14

12:27 pm-5:30 pm

1 stop4h 03m

$250

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

6:55 pm-10:10 pm

1 stop4h 15m

Lambert-St Louis

Tue 4/21

10:25 am-3:20 pm

1 stop3h 55m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/14

9:45 am-6:00 pm

2 stops9h 15m

Lambert-St Louis

Tue 4/21

7:35 am-2:35 pm

2 stops6h 00m

$267

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 3/25

5:29 pm-9:07 pm

1 stop4h 38m

Lambert-St Louis

Sat 3/28

6:25 am-1:17 pm

1 stop5h 52m

$277

BuffaloMoline

BUF - MLI

BUFMLI

Buffalo

Sat 4/18

7:00 am-9:58 am

1 stop3h 58m

Moline Quad-City

Tue 4/21

6:30 am-1:13 pm

1 stop5h 43m

$339

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How to get the cheapest flight ticket from Buffalo to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Buffalo is in August. Flight prices, which tend to average around $218, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $269.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Buffalo to Illinois is on a Friday when prices can be found for as low as $417. Flights from Buffalo to Illinois on a Sunday will generally be more expensive and average around $524. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Buffalo to Illinois during this time can be as low as $404. Flights at noon are often more expensive with an average ticket price of $633.

What is the cheapest Buffalo to Illinois flight route?

Fly from Buffalo to Chicago O'Hare Intl for the best Buffalo - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Buffalo when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $330 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Buffalo for as low as $203 on momondo.

What cabin class options are available on Buffalo to Illinois flights?

There are 4 cabin classes available to choose from on Buffalo to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Buffalo to Illinois flights?

You could potentially save up to 42% on your flight if you consider stops on a Buffalo to Illinois flight.

Cheap Buffalo to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buffalo to Illinois

Best Price Found	$179
Fastest flight time	1h 35m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Buffalo in the past 72 hours is $179. The best round-trip flight deal from Buffalo to Illinois found on momondo in the last 72 hours is $342.

The fastest flight from Buffalo to Illinois takes 1h 35m

Direct flights go from Buffalo to Illinois every day.

There are 98 airports in Illinois. From Buffalo there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

When did momondo last update prices for flights from Buffalo Airport to Illinois?
Prices for flights from Buffalo Airport to Illinois are updated daily.
How many operators does momondo search for flights from Buffalo Airport to Illinois?
As of March 2026, there are 5 operators available to choose from for flights from Buffalo Airport to Illinois.
How old do you have to be to fly from Buffalo Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Buffalo Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Buffalo to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Buffalo to Illinois is Boeing 737 MAX 8 (14.06% of total bookings). The next most popular plane models are Embraer 175 (11.73%), Canadair (Bombardier) Regional Jet CRJ-550 (11.45%), and Airbus A319 (11.36%).

Best airlines flying from Buffalo to Illinois

Compare and see reviews for airlines that fly from Buffalo to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $92	Free Cancellation	Rating 5.7 3,040 reviews	Search Frontier flights
United Airlines	PriceFrom $145	Free Cancellation	Rating 7.4 9,376 reviews	Search United Airlines flights
American Airlines	PriceFrom $145	Free Cancellation	Rating 7.1 11,369 reviews	Search American Airlines flights
Southwest	PriceFrom $237	Free Cancellation	Rating 8.0 4,306 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Buffalo to Illinois?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Buffalo to Illinois. momondo saves you time and could save you money on your trip.

Can I find flights from Buffalo to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Buffalo to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Buffalo to Illinois?

Once all potential Buffalo to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Buffalo to Illinois right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Buffalo to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.

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Popular cities in Illinois

Flights to New Yorkfrom $55

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Flights to Orlandofrom $46

Flights to Chicagofrom $55

Flights to San Franciscofrom $50

Flights to Las Vegasfrom $53

Flights to Washington, D.C.from $56

Flights to Bostonfrom $76

Flights to Atlantafrom $53

Flights to Dallasfrom $60

Flights to Seattlefrom $48

Cheap flights from Buffalo to Illinois from $76

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Buffalo to Illinois departing on 4/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Buffalo to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Buffalo to Illinois flight route?

How far in advance should I book a flight to Illinois?

What cabin class options are available on Buffalo to Illinois flights?

Can stopping save me money on Buffalo to Illinois flights?

What is the cheapest airline that flies from Buffalo to Illinois?

What airlines fly to Illinois?

How many flights depart from Buffalo to Illinois on average per day?

How many flights depart from Buffalo to Illinois on average per week?

Cheap Buffalo to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buffalo to Illinois

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Airports in Illinois

Best airlines flying from Buffalo to Illinois

Compare and see reviews for airlines that fly from Buffalo to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

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