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Cheap flights from Buffalo to Illinois from $78

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 9/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Buffalo to Illinois

Cheap round-trip flights

American Airlines Logo
11:46 am - 12:40 pmBUF-ORD
1h 54mnonstop
American Airlines Logo
7:09 pm - 9:51 pmORD-BUF
1h 42mnonstop
$155American Airlines
Find Deal
Wed, Sep 17 - Wed, Oct 1
Southwest Logo
6:40 am - 7:20 amBUF-MDW
1h 40mnonstop
Southwest Logo
6:05 pm - 8:30 pmMDW-BUF
1h 25mnonstop
$166Southwest
Find Deal
Sat, Oct 4 - Tue, Oct 7
United Airlines Logo
1:57 pm - 2:55 pmBUF-ORD
1h 58mnonstop
United Airlines Logo
6:28 pm - 9:16 pmORD-BUF
1h 48mnonstop
$166United Airlines
Find Deal
Tue, Sep 2 - Sat, Sep 6
Southwest Logo
3:50 pm - 8:55 pmBUF-MDW
6h 05m1 stop
Southwest Logo
10:10 am - 12:40 pmMDW-BUF
1h 30mnonstop
$176Southwest
Find Deal
Sat, Oct 4 - Tue, Oct 7
American Airlines Logo
7:30 am - 8:25 amBUF-ORD
1h 55mnonstop
American Airlines Logo
8:50 pm - 11:35 pmORD-BUF
1h 45mnonstop
$177American Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
Delta Logo
6:20 am - 10:20 amBUF-ORD
5h 00m1 stop
Delta Logo
5:45 pm - 10:59 pmORD-BUF
4h 14m1 stop
$187Delta
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Tue, Sep 2 - Sat, Sep 6
Delta Logo
6:15 am - 8:40 amBUF-MDW
3h 25m1 stop
Delta Logo
6:23 pm - 10:52 pmMDW-BUF
3h 29m1 stop
$197Delta
Find Deal
Thu, Oct 2 - Mon, Oct 6
United Airlines Logo
10:50 am - 11:56 amBUF-ORD
2h 06mnonstop
United Airlines Logo
7:25 am - 10:03 amORD-BUF
1h 38mnonstop
$202United Airlines
Find Deal
Tue, Oct 28 - Fri, Oct 31
Frontier Logo
4:39 pm - 11:59 pmBUF-ORD
8h 20m1 stop
Frontier Logo
8:00 am - 6:41 pmORD-BUF
9h 41m1 stop
$214Frontier
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Thu, Oct 30 - Sat, Nov 1
Frontier Logo
9:45 am - 4:57 pmBUF-ORD
8h 12m1 stop
Frontier Logo
7:46 pm - 10:17 amORD-BUF
13h 31m1 stop
$216Frontier
Find Deal
Thu, Aug 21 - Sat, Aug 23

United Airlines flights from Buffalo to Illinois

Our best United Airlines deals on Buffalo to Illinois flight tickets
United Airlines
Sep 2
BUF1:57 pmBuffalo
1h 58m
ORD2:55 pmChicago O'Hare Intl
Sep 6
ORD6:28 pmChicago O'Hare Intl
1h 48m
BUF9:16 pmBuffalo
$166
Find similar
United Airlines
Oct 28
BUF10:50 amBuffalo
2h 06m
ORD11:56 amChicago O'Hare Intl
Oct 31
ORD7:25 amChicago O'Hare Intl
1h 38m
BUF10:03 amBuffalo
$202
Find similar
United Airlines
Sep 4
BUF5:54 pmBuffalo
1h 56m
ORD6:50 pmChicago O'Hare Intl
Sep 6
ORD7:10 amChicago O'Hare Intl
1h 43m
BUF9:53 amBuffalo
$233
Find similar

Delta flights from Buffalo to Illinois

Our best Delta deals on Buffalo to Illinois flight tickets
Delta
Sep 2
BUF6:20 amBuffalo
5h 00m
1 stop
ORD10:20 amChicago O'Hare Intl
Sep 6
ORD5:45 pmChicago O'Hare Intl
4h 14m
1 stop
BUF10:59 pmBuffalo
$187
Find similar
Delta
Oct 2
BUF4:43 pmBuffalo
5h 42m
1 stop
ORD9:25 pmChicago O'Hare Intl
Oct 6
ORD4:58 pmChicago O'Hare Intl
4h 54m
1 stop
BUF10:52 pmBuffalo
$197
Find similar
Delta
Sep 13
BUF12:06 pmBuffalo
4h 59m
1 stop
STL4:05 pmLambert-St Louis
Sep 15
STL3:36 pmLambert-St Louis
7h 01m
1 stop
BUF11:37 pmBuffalo
$237
Find similar

momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated August 11, 2025.
Use the filters below to find and compare flights from Buffalo to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Wed 9/17

11:46 am-12:40 pm

Nonstop1h 54m

Chicago O'Hare Intl

Wed 10/1

7:09 pm-9:51 pm

Nonstop1h 42m

$155

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Sat 10/4

6:40 am-7:20 am

Nonstop1h 40m

Chicago Midway

Tue 10/7

6:05 pm-8:30 pm

Nonstop1h 25m

$166

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 9/2

1:57 pm-2:55 pm

Nonstop1h 58m

Chicago O'Hare Intl

Sat 9/6

6:28 pm-9:16 pm

Nonstop1h 48m

$166

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Sat 10/4

3:50 pm-8:55 pm

1 stop6h 05m

Chicago Midway

Tue 10/7

10:10 am-12:40 pm

Nonstop1h 30m

$176

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 10/2

7:30 am-8:25 am

Nonstop1h 55m

Chicago O'Hare Intl

Mon 10/6

8:50 pm-11:35 pm

Nonstop1h 45m

$177

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 9/2

6:20 am-10:20 am

1 stop5h 00m

Chicago O'Hare Intl

Sat 9/6

5:45 pm-10:59 pm

1 stop4h 14m

$187

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

Thu 10/2

6:15 am-8:40 am

1 stop3h 25m

Chicago Midway

Mon 10/6

6:23 pm-10:52 pm

1 stop3h 29m

$197

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Tue 10/28

10:50 am-11:56 am

Nonstop2h 06m

Chicago O'Hare Intl

Fri 10/31

7:25 am-10:03 am

Nonstop1h 38m

$202

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 10/30

4:39 pm-11:59 pm

1 stop8h 20m

Chicago O'Hare Intl

Sat 11/1

8:00 am-6:41 pm

1 stop9h 41m

$214

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

Thu 8/21

9:45 am-4:57 pm

1 stop8h 12m

Chicago O'Hare Intl

Sat 8/23

7:46 pm-10:17 am

1 stop13h 31m

$216

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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

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 $252, 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 $289.

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 $428. Flights from Buffalo to Illinois on a Sunday will generally be more expensive and average around $515. 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 $425. Flights at noon are often more expensive with an average ticket price of $644.

What is the cheapest Buffalo to Illinois flight route?

Fly from Buffalo to Chicago Midway 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 $342 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 $225 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?

No. A direct flight is the cheapest option for a flight between Buffalo to Illinois.

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

$78

Fastest flight time

1h 35m

Direct flights

Every day

Airports in Illinois

4 airports
The best one-way flight to Illinois from Buffalo in the past 72 hours is $78. The best round-trip flight deal from Buffalo to Illinois found on momondo in the last 72 hours is $155.
The fastest flight from Buffalo to Illinois takes 1h 35m
Direct flights go from Buffalo to Illinois every day.
There are 4 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL), Moline Quad-City (MLI)
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?

  • 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?

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
FrontierPriceFrom $58Free CancellationRating
5.8
3,221 reviews
Search Frontier flights
American AirlinesPriceFrom $161Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $186Free CancellationRating
7.4
8,920 reviews
Search United Airlines flights
SouthwestPriceFrom $247Free CancellationRating
8.0
4,248 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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