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Cheap flights from Buffalo to Illinois from $80

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 8/11. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Buffalo to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$187Frontier
mar., jul. 21 - jue., jul. 23
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$190Frontier
mar., ago. 4 - dom., ago. 9
JetBlue Logo
3:52 pm - 9:55 pm
BUF
-
ORD
7h 03m
1 stop
JetBlue Logo
9:39 am - 6:54 pm
ORD
-
BUF
8h 15m
1 stop
$256JetBlue
sáb., ago. 8 - dom., ago. 9
American Airlines Logo
6:32 am - 7:35 am
BUF
-
ORD
2h 03mnonstop
American Airlines Logo
6:46 am - 9:37 am
ORD
-
BUF
1h 51mnonstop
$257American Airlines
mar., jul. 7 - mar., jul. 14
Southwest Logo
6:25 pm - 7:05 pm
BUF
-
MDW
1h 40mnonstop
Southwest Logo
8:40 am - 11:20 am
MDW
-
BUF
1h 40mnonstop
$257Southwest
mié., ago. 12 - mié., ago. 26
JetBlue Logo
6:00 am - 12:16 pm
BUF
-
ORD
7h 16m
1 stop
JetBlue Logo
6:00 am - 2:59 pm
ORD
-
BUF
7h 59m
1 stop
$259JetBlue
sáb., ago. 1 - mar., ago. 4
American Airlines Logo
10:07 am - 11:09 am
BUF
-
ORD
2h 02mnonstop
American Airlines Logo
8:29 am - 2:19 pm
ORD
-
BUF
4h 50m
1 stop
$263American Airlines
vie., jul. 3 - sáb., jul. 4
Southwest Logo
8:05 am - 1:15 pm
BUF
-
MDW
6h 10m
1 stop
Southwest Logo
8:40 am - 11:20 am
MDW
-
BUF
1h 40mnonstop
$267Southwest
mié., ago. 12 - mié., ago. 26
United Airlines Logo
6:55 am - 9:54 am
BUF
-
MLI
3h 59m
1 stop
United Airlines Logo
10:30 am - 4:56 pm
MLI
-
BUF
5h 26m
1 stop
$309United Airlines
mié., ago. 26 - sáb., ago. 29
United Airlines Logo
10:57 am - 1:56 pm
BUF
-
MLI
3h 59m
1 stop
United Airlines Logo
10:40 am - 4:41 pm
MLI
-
BUF
5h 01m
1 stop
$342United Airlines
mié., jul. 15 - sáb., jul. 18

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American Airlines flights from Buffalo to Illinois

Our best American Airlines deals on Buffalo to Illinois flight tickets
American Airlines
Jul 7
BUF6:32 amBuffalo
2h 03m
ORD7:35 amChicago O'Hare Intl
Jul 14
ORD6:46 amChicago O'Hare Intl
1h 51m
BUF9:37 amBuffalo
$257
American Airlines
Jul 3
BUF10:07 amBuffalo
2h 02m
ORD11:09 amChicago O'Hare Intl
Jul 4
ORD8:29 amChicago O'Hare Intl
4h 50m
1 stop
BUF2:19 pmBuffalo
$263
American Airlines
Jul 7
BUF11:41 amBuffalo
5h 20m
1 stop
ORD4:01 pmChicago O'Hare Intl
Jul 14
ORD9:19 pmChicago O'Hare Intl
1h 40m
BUF11:59 pmBuffalo
$267

United Airlines flights from Buffalo to Illinois

Our best United Airlines deals on Buffalo to Illinois flight tickets
United Airlines
Sep 3
BUF6:55 amBuffalo
2h 00m
ORD7:55 amChicago O'Hare Intl
Sep 6
ORD2:07 pmChicago O'Hare Intl
1h 49m
BUF4:56 pmBuffalo
$276
United Airlines
Oct 8
BUF7:00 amBuffalo
2h 00m
ORD8:00 amChicago O'Hare Intl
Oct 12
ORD6:50 amChicago O'Hare Intl
1h 39m
BUF9:29 amBuffalo
$299
United Airlines
Aug 1
BUF7:00 amBuffalo
2h 05m
ORD8:05 amChicago O'Hare Intl
Aug 5
ORD7:15 amChicago O'Hare Intl
1h 45m
BUF10:00 amBuffalo
$303

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 junio 20, 2026.
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

Cheapest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 7/21

11:29 am-5:37 pm

1 stop7h 08m

Lambert-St Louis

jue. 7/23

6:34 pm-1:53 pm

1 stop18h 19m

$187

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 8/4

11:29 am-5:37 pm

1 stop7h 08m

Lambert-St Louis

dom. 8/9

6:34 pm-1:53 pm

1 stop18h 19m

$190

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

sáb. 8/8

3:52 pm-9:55 pm

1 stop7h 03m

Chicago O'Hare Intl

dom. 8/9

9:39 am-6:54 pm

1 stop8h 15m

$256

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

mar. 7/7

6:32 am-7:35 am

Nonstop2h 03m

Chicago O'Hare Intl

mar. 7/14

6:46 am-9:37 am

Nonstop1h 51m

$257
Quickest round-trip

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

mié. 8/12

6:25 pm-7:05 pm

Nonstop1h 40m

Chicago Midway

mié. 8/26

8:40 am-11:20 am

Nonstop1h 40m

$257

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

sáb. 8/1

6:00 am-12:16 pm

1 stop7h 16m

Chicago O'Hare Intl

mar. 8/4

6:00 am-2:59 pm

1 stop7h 59m

$259

BuffaloChicago

BUF - ORD

BUFORD

Buffalo

vie. 7/3

10:07 am-11:09 am

Nonstop2h 02m

Chicago O'Hare Intl

sáb. 7/4

8:29 am-2:19 pm

1 stop4h 50m

$263

BuffaloChicago

BUF - MDW

BUFMDW

Buffalo

mié. 8/12

8:05 am-1:15 pm

1 stop6h 10m

Chicago Midway

mié. 8/26

8:40 am-11:20 am

Nonstop1h 40m

$267

BuffaloMoline

BUF - MLI

BUFMLI

Buffalo

mié. 8/26

6:55 am-9:54 am

1 stop3h 59m

Moline Quad-City

sáb. 8/29

10:30 am-4:56 pm

1 stop5h 26m

$309

BuffaloMoline

BUF - MLI

BUFMLI

Buffalo

mié. 7/15

10:57 am-1:56 pm

1 stop3h 59m

Moline Quad-City

sáb. 7/18

10:40 am-4:41 pm

1 stop5h 01m

$342

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 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 October is also cheap. Prices for this month can be found on momondo for an average of $78.

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

The cheapest day to depart from Buffalo to Illinois is on a Thursday when prices can be found for as low as $438. Flights from Buffalo to Illinois on a Sunday will generally be more expensive and average around $553. 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 $429. Flights at noon are often more expensive with an average ticket price of $606.

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 $322 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 $223 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 16% 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

$203

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 $203. The best round-trip flight deal from Buffalo to Illinois found on momondo in the last 72 hours is $392.
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?

  • 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 $92Free CancellationRating
5.6
2,879 reviews
Search Frontier flights
American AirlinesPriceFrom $145Free CancellationRating
7.1
11,709 reviews
Search American Airlines flights
United AirlinesPriceFrom $232Free CancellationRating
7.4
9,865 reviews
Search United Airlines flights
SouthwestPriceFrom $237Free CancellationRating
7.9
4,241 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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