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Cheap flights from Illinois to Buffalo from $55

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Buffalo departing on 1/15. 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 Illinois to Buffalo

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
3:30 pm - 11:51 amSTL-BUF
19h 21m1 stop
Frontier Logo
3:18 pm - 10:33 pmBUF-STL
8h 15m1 stop
$129Frontier
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Thu, Dec 4 - Sat, Dec 13
Frontier Logo
3:10 pm - 11:51 amMDW-BUF
19h 41m1 stop
Frontier Logo
12:35 pm - 6:08 pmBUF-MDW
6h 33m1 stop
$152Frontier
Find Deal
Thu, Dec 4 - Thu, Dec 11
JetBlue Logo
7:00 am - 3:59 pmORD-BUF
7h 59m1 stop
JetBlue Logo
5:00 pm - 9:52 pmBUF-ORD
5h 52m1 stop
$193JetBlue
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Wed, Dec 3 - Wed, Dec 10
JetBlue Logo
11:25 am - 5:24 pmORD-BUF
4h 59m1 stop
JetBlue Logo
11:48 am - 7:43 pmBUF-ORD
8h 55m1 stop
$196JetBlue
Find Deal
Thu, Dec 4 - Sun, Dec 7
Multiple Airlines Logo
12:04 pm - 10:45 amSTL-BUF
21h 41m1 stop
Multiple Airlines Logo
3:18 pm - 9:47 amBUF-STL
19h 29m2 stops
$198Multiple Airlines
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Thu, Dec 4 - Sat, Dec 13
Multiple Airlines Logo
6:05 pm - 1:06 pmORD-BUF
18h 01m2 stops
Multiple Airlines Logo
12:20 pm - 11:06 pmBUF-ORD
11h 46m1 stop
$199Multiple Airlines
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Wed, Nov 19 - Sun, Nov 23
American Airlines Logo
7:04 am - 9:44 amORD-BUF
1h 40mnonstop
American Airlines Logo
2:50 pm - 4:03 pmBUF-ORD
2h 13mnonstop
$224American Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
American Airlines Logo
8:59 pm - 11:39 pmORD-BUF
1h 40mnonstop
American Airlines Logo
11:26 am - 7:24 pmBUF-ORD
8h 58m1 stop
$228American Airlines
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Tue, Dec 9 - Wed, Dec 17
United Airlines Logo
7:10 am - 9:48 amORD-BUF
1h 38mnonstop
United Airlines Logo
5:41 pm - 6:48 pmBUF-ORD
2h 07mnonstop
$236United Airlines
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Fri, Dec 12 - Thu, Jan 1
United Airlines Logo
8:30 am - 2:22 pmSTL-BUF
4h 52m1 stop
United Airlines Logo
6:00 am - 2:25 pmBUF-STL
9h 25m2 stops
$262United Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10

Frontier flights from Illinois to Buffalo

Our best Frontier deals on Illinois to Buffalo flight tickets
Frontier
Dec 4
STL3:30 pmLambert-St Louis
19h 21m
1 stop
BUF11:51 amBuffalo
Dec 13
BUF3:18 pmBuffalo
8h 15m
1 stop
STL10:33 pmLambert-St Louis
$129
Find similar
Frontier
Dec 4
MDW3:10 pmChicago Midway
19h 41m
1 stop
BUF11:51 amBuffalo
Dec 11
BUF12:35 pmBuffalo
6h 33m
1 stop
MDW6:08 pmChicago Midway
$152
Find similar
Frontier
Dec 12
STL3:30 pmLambert-St Louis
21h 45m
1 stop
BUF2:15 pmBuffalo
Dec 14
BUF3:18 pmBuffalo
18h 41m
1 stop
STL8:59 amLambert-St Louis
$154
Find similar

Southwest flights from Illinois to Buffalo

Our best Southwest deals on Illinois to Buffalo flight tickets
Southwest
Dec 12
MDW5:10 amChicago Midway
5h 50m
1 stop
BUF12:00 pmBuffalo
Jan 1
BUF6:25 pmBuffalo
1h 45m
MDW7:10 pmChicago Midway
$246
Find similar
Southwest
Dec 4
MDW6:10 pmChicago Midway
1h 30m
BUF8:40 pmBuffalo
Dec 11
BUF6:15 amBuffalo
1h 50m
MDW7:05 amChicago Midway
$273
Find similar
Southwest
Dec 4
MDW6:10 pmChicago Midway
1h 30m
BUF8:40 pmBuffalo
Dec 11
BUF12:10 pmBuffalo
7h 15m
1 stop
MDW6:25 pmChicago Midway
$283
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Buffalo 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 November 6, 2025.
Use the filters below to find and compare flights from Illinois to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 12/4

3:30 pm-11:51 am

1 stop19h 21m

Buffalo

Sat 12/13

3:18 pm-10:33 pm

1 stop8h 15m

$129

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Thu 12/4

3:10 pm-11:51 am

1 stop19h 41m

Buffalo

Thu 12/11

12:35 pm-6:08 pm

1 stop6h 33m

$152

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 12/3

7:00 am-3:59 pm

1 stop7h 59m

Buffalo

Wed 12/10

5:00 pm-9:52 pm

1 stop5h 52m

$193

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 12/4

11:25 am-5:24 pm

1 stop4h 59m

Buffalo

Sun 12/7

11:48 am-7:43 pm

1 stop8h 55m

$196

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 12/4

12:04 pm-10:45 am

1 stop21h 41m

Buffalo

Sat 12/13

3:18 pm-9:47 am

2 stops19h 29m

$198

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 11/19

6:05 pm-1:06 pm

2 stops18h 01m

Buffalo

Sun 11/23

12:20 pm-11:06 pm

1 stop11h 46m

$199

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Thu 12/4

7:04 am-9:44 am

Nonstop1h 40m

Buffalo

Sun 12/7

2:50 pm-4:03 pm

Nonstop2h 13m

$224

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 12/9

8:59 pm-11:39 pm

Nonstop1h 40m

Buffalo

Wed 12/17

11:26 am-7:24 pm

1 stop8h 58m

$228

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Fri 12/12

7:10 am-9:48 am

Nonstop1h 38m

Buffalo

Thu 1/1

5:41 pm-6:48 pm

Nonstop2h 07m

$236

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 12/3

8:30 am-2:22 pm

1 stop4h 52m

Buffalo

Wed 12/10

6:00 am-2:25 pm

2 stops9h 25m

$262

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 Buffalo from

How to get the cheapest flight ticket from Illinois to Buffalo

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 Buffalo?

If you aren’t able to travel during the month of September, then book flights to Buffalo from Illinois during August instead. Flights to Buffalo in August, while not as cheap as those in September, still average around $291.

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

Our data shows that Tuesday is the least expensive day to fly to Buffalo. Tickets to fly out on this day can be as low as $279. Flights from Illinois to Buffalo on a Sunday will generally be more expensive and average around $369. 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 Buffalo?

In the evening is the cheapest time of day to fly from Illinois to Buffalo when you can find flight prices for as low as $329. Flying to Buffalo in the evening is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Buffalo, so prices are often more expensive at around $349 per ticket.

What is the cheapest Illinois to Buffalo flight route?

Fly from Chicago Midway to Buffalo for the best Illinois - Buffalo flight prices

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

You are more likely to see cheaper flights to Buffalo from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Buffalo for around $332 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buffalo from Illinois for as low as $265 on momondo.

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

There are 4 cabin classes available to choose from on Illinois to Buffalo 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 Illinois to Buffalo flights?

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

Cheap Illinois to Buffalo flight deals and tips

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

Best Price Found

$212

Fastest flight time

1h 25m

Direct flights

Every day

Airports in Buffalo

1 airport
The best one-way flight to Buffalo from Illinois in the past 72 hours is $212. The best round-trip flight deal from Illinois to Buffalo found on momondo in the last 72 hours is $319.
The fastest flight from Illinois to Buffalo takes 1h 25m
Direct flights go from Illinois to Buffalo every day.
There is 1 airport near Buffalo: Buffalo (BUF)
Search flight deals

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

    Prices for flights from Illinois to Buffalo Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Buffalo Airport.

  • What documentation or ID do you need to fly to Buffalo Airport?

    The travel and health documents you'll need for your trip to Buffalo Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Buffalo Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Illinois to Buffalo?

Best airlines flying from Illinois to Buffalo

Compare and see reviews for airlines that fly from Illinois to Buffalo with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $132Free CancellationRating
5.8
3,116 reviews
Search Frontier flights
American AirlinesPriceFrom $177Free CancellationRating
7.2
11,041 reviews
Search American Airlines flights
United AirlinesPriceFrom $197Free CancellationRating
7.4
9,003 reviews
Search United Airlines flights
SouthwestPriceFrom $278Free CancellationRating
8.0
4,240 reviews
Search Southwest flights

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Batavia
Cheektowaga
Amherst
Tonawanda
Grand Island
Williamsville
Lockport
Orchard Park
West Seneca
East Aurora
Bowmansville
Eden
Angola

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Buffalo from Illinois.

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

momondo does allow users to show only those flights to Buffalo from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Illinois to Buffalo 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 Illinois to Buffalo right now. Can momondo alert me if prices change?

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

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