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

As of May 2026, 220 flights take off from Buffalo and land in Illinois each week. The most common flight departure day for this route is Tue, with 18% 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 51% 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?

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

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

31 flights are operational daily from Buffalo to Illinois as of May 2026. The most popular departure time for this route is 11:00AM, with 45% of flights per day taking off at noon.

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 May 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.

$61 Cheap Flights from Buffalo to Illinois in 2026

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:50 pm - 5:30 pm

BUF

STL

27h 40m

1 stop

5:06 pm - 10:55 am

STL

BUF

16h 49m

1 stop

$124Frontier

Wed, Jun 10 - Mon, Jun 15

11:36 am - 5:33 pm

BUF

STL

6h 57m

1 stop

5:27 pm - 10:41 am

STL

BUF

16h 14m

1 stop

$129Frontier

Tue, Jun 2 - Sat, Jun 6

2:49 pm - 8:55 am

BUF

STL

19h 06m

1 stop

5:27 pm - 11:10 am

STL

BUF

16h 43m

1 stop

$133Frontier

Fri, Jun 5 - Mon, Jun 8

6:00 am - 6:59 am

BUF

ORD

1h 59mnonstop

4:49 pm - 10:50 pm

ORD

BUF

5h 01m

1 stop

$247American Airlines

Wed, Jun 24 - Tue, Jun 30

8:20 am - 9:00 am

BUF

MDW

1h 40mnonstop

6:55 pm - 9:25 pm

MDW

BUF

1h 30mnonstop

$247Southwest

Wed, Jun 3 - Wed, Jun 10

10:01 am - 11:08 am

BUF

ORD

2h 07mnonstop

3:15 pm - 9:50 pm

ORD

BUF

5h 35m

1 stop

$248American Airlines

Wed, Jun 24 - Tue, Jun 30

6:04 pm - 7:03 pm

BUF

ORD

1h 59mnonstop

6:17 pm - 9:03 pm

ORD

BUF

1h 46mnonstop

$251United Airlines

Wed, Jun 3 - Mon, Jun 8

8:00 pm - 8:40 pm

BUF

MDW

1h 40mnonstop

7:50 am - 10:20 am

MDW

BUF

1h 30mnonstop

$251Southwest

Thu, May 28 - Tue, Jun 2

6:00 am - 12:05 pm

BUF

MDW

7h 05m

1 stop

9:54 am - 6:27 pm

MDW

BUF

7h 33m

1 stop

$257Delta

Wed, Jun 24 - Tue, Jun 30

5:12 pm - 10:34 pm

BUF

MLI

6h 22m

1 stop

5:17 pm - 11:59 pm

MLI

BUF

5h 42m

1 stop

$309Delta

Tue, Jun 9 - Tue, Jun 16

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United Airlines flights from Buffalo to Illinois

Our best United Airlines deals on Buffalo to Illinois flight tickets

United Airlines

Jun 3

BUF6:04 pmBuffalo

1h 59m

ORD7:03 pmChicago O'Hare Intl

Jun 8

ORD6:17 pmChicago O'Hare Intl

1h 46m

BUF9:03 pmBuffalo

$251

United Airlines

May 30

BUF10:50 amBuffalo

2h 03m

ORD11:53 amChicago O'Hare Intl

May 30

ORD6:17 pmChicago O'Hare Intl

1h 46m

BUF9:03 pmBuffalo

$265

United Airlines

Jun 2

BUF7:00 amBuffalo

1h 59m

ORD7:59 amChicago O'Hare Intl

Jun 10

ORD6:17 pmChicago O'Hare Intl

1h 46m

BUF9:03 pmBuffalo

$307

Delta flights from Buffalo to Illinois

Our best Delta deals on Buffalo to Illinois flight tickets

Delta

Jun 2

BUF6:25 amBuffalo

3h 20m

1 stop

ORD8:45 amChicago O'Hare Intl

Jun 2

ORD5:19 pmChicago O'Hare Intl

5h 40m

1 stop

BUF11:59 pmBuffalo

$257

Delta

Jun 1

BUF6:15 amBuffalo

5h 01m

1 stop

ORD10:16 amChicago O'Hare Intl

Jun 9

ORD9:48 amChicago O'Hare Intl

5h 18m

1 stop

BUF4:06 pmBuffalo

$271

Delta

May 30

BUF6:25 amBuffalo

3h 20m

1 stop

ORD8:45 amChicago O'Hare Intl

May 30

ORD3:00 pmChicago O'Hare Intl

7h 59m

1 stop

BUF11:59 pmBuffalo

$285

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 6/10

2:50 pm-5:30 pm

1 stop27h 40m

Lambert-St Louis

Mon 6/15

5:06 pm-10:55 am

1 stop16h 49m

$124

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 6/2

11:36 am-5:33 pm

1 stop6h 57m

Lambert-St Louis

Sat 6/6

5:27 pm-10:41 am

1 stop16h 14m

$129

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 6/5

2:49 pm-8:55 am

1 stop19h 06m

Lambert-St Louis

Mon 6/8

5:27 pm-11:10 am

1 stop16h 43m

$133

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Wed 6/24

6:00 am-6:59 am

Nonstop1h 59m

Chicago O'Hare Intl

Tue 6/30

4:49 pm-10:50 pm

1 stop5h 01m

$247

Quickest round-trip

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Wed 6/3

8:20 am-9:00 am

Nonstop1h 40m

Chicago Midway

Wed 6/10

6:55 pm-9:25 pm

Nonstop1h 30m

$247

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Wed 6/24

10:01 am-11:08 am

Nonstop2h 07m

Chicago O'Hare Intl

Tue 6/30

3:15 pm-9:50 pm

1 stop5h 35m

$248

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Wed 6/3

6:04 pm-7:03 pm

Nonstop1h 59m

Chicago O'Hare Intl

Mon 6/8

6:17 pm-9:03 pm

Nonstop1h 46m

$251

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 5/28

8:00 pm-8:40 pm

Nonstop1h 40m

Chicago Midway

Tue 6/2

7:50 am-10:20 am

Nonstop1h 30m

$251

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Wed 6/24

6:00 am-12:05 pm

1 stop7h 05m

Chicago Midway

Tue 6/30

9:54 am-6:27 pm

1 stop7h 33m

$257

BuffaloMoline

BUF - MLI

BUFMLI

Buffalo

Tue 6/9

5:12 pm-10:34 pm

1 stop6h 22m

Moline Quad-City

Tue 6/16

5:17 pm-11:59 pm

1 stop5h 42m

$309

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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

Prices

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What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Buffalo is in March. Flight prices, which tend to average around $73, 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 March, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $77.

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 $548. 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 $410. Flights at noon are often more expensive with an average ticket price of $592.

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 from Buffalo 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 $319 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 $121 on momondo.

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 $359.

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

Frequently asked questions about flying from Buffalo to Illinois

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 May 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 Airbus A319 (13.58% of total bookings). The next most popular plane models are Embraer 175 (12.30%), Boeing 737 MAX 8 (11.96%), and Canadair (Bombardier) Regional Jet CRJ-550 (11.69%).

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 5.6 2,965 reviews	Search Frontier flights
American Airlines	PriceFrom $145	Free Cancellation	Rating 7.1 11,670 reviews	Search American Airlines flights
United Airlines	PriceFrom $188	Free Cancellation	Rating 7.4 9,683 reviews	Search United Airlines flights
Southwest	PriceFrom $237	Free Cancellation	Rating 7.9 4,305 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 $72

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Flights to Chicagofrom $56

Flights to San Franciscofrom $73

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $92

Flights to Atlantafrom $55

Flights to Dallasfrom $76

Flights to Fort Lauderdalefrom $56

Cheap flights from Buffalo to Illinois from $61

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 6/18. 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?

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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 from Buffalo to Illinois?

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?

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Frequently asked questions about flying from Buffalo to Illinois

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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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