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Cheap flights from Illinois to Buffalo from $84

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 7/15. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Buffalo

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
6:00 am - 2:55 pm
ORD
-
BUF
7h 55m
1 stop
JetBlue Logo
3:32 pm - 9:30 pm
BUF
-
ORD
6h 58m
1 stop
$153JetBlue
Wed, Jul 1 - Fri, Jul 3
JetBlue Logo
6:00 am - 2:59 pm
ORD
-
BUF
7h 59m
1 stop
JetBlue Logo
3:55 pm - 9:03 pm
BUF
-
ORD
6h 08m
1 stop
$160JetBlue
Tue, Jul 7 - Wed, Jul 8
JetBlue Logo
9:39 am - 6:51 pm
ORD
-
BUF
8h 12m
1 stop
JetBlue Logo
9:15 am - 5:20 pm
BUF
-
ORD
9h 05m
1 stop
$161JetBlue
Wed, Aug 19 - Tue, Aug 25
Frontier Logo
4:57 pm - 11:33 am
STL
-
BUF
17h 36m
1 stop
Frontier Logo
2:48 pm - 5:37 pm
BUF
-
STL
27h 49m
1 stop
$183Frontier
Fri, Jul 31 - Mon, Aug 10
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
Frontier Logo
2:48 pm - 8:57 am
BUF
-
STL
19h 09m
1 stop
$186Frontier
Tue, Aug 4 - Fri, Aug 7
Delta Logo
6:40 am - 11:17 am
STL
-
BUF
3h 37m
1 stop
Delta Logo
9:00 am - 1:20 pm
BUF
-
STL
5h 20m
1 stop
$221Delta
Wed, Sep 30 - Tue, Oct 13
Southwest Logo
6:30 am - 2:20 pm
MDW
-
BUF
6h 50m
1 stop
Southwest Logo
6:25 pm - 7:05 pm
BUF
-
MDW
1h 40mnonstop
$231Southwest
Wed, Aug 19 - Tue, Aug 25
American Airlines Logo
6:52 pm - 12:38 am
MLI
-
BUF
4h 46m
1 stop
American Airlines Logo
6:00 am - 10:58 am
BUF
-
MLI
5h 58m
1 stop
$309American Airlines
Wed, Jul 1 - Sat, Jul 4
American Airlines Logo
6:52 pm - 12:38 am
MLI
-
BUF
4h 46m
1 stop
American Airlines Logo
8:00 am - 6:18 pm
BUF
-
MLI
11h 18m
2 stops
$314American Airlines
Wed, Jul 1 - Sat, Jul 4
Delta Logo
4:19 pm - 11:59 pm
BMI
-
BUF
6h 40m
1 stop
Delta Logo
6:00 am - 11:23 am
BUF
-
BMI
6h 23m
1 stop
$324Delta
Mon, Jun 29 - Sat, Jul 11

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Frontier flights from Illinois to Buffalo

Our best Frontier deals on Illinois to Buffalo flight tickets
Frontier
Jul 31
STL4:57 pmLambert-St Louis
17h 36m
1 stop
BUF11:33 amBuffalo
Aug 10
BUF2:48 pmBuffalo
27h 49m
1 stop
STL5:37 pmLambert-St Louis
$183
Frontier
Aug 4
STL6:34 pmLambert-St Louis
18h 19m
1 stop
BUF1:53 pmBuffalo
Aug 7
BUF2:48 pmBuffalo
19h 09m
1 stop
STL8:57 amLambert-St Louis
$186
Frontier
Jul 7
STL6:34 pmLambert-St Louis
18h 19m
1 stop
BUF1:53 pmBuffalo
Jul 14
BUF11:29 amBuffalo
7h 08m
1 stop
STL5:37 pmLambert-St Louis
$187

Delta flights from Illinois to Buffalo

Our best Delta deals on Illinois to Buffalo flight tickets
Delta
Sep 30
STL6:40 amLambert-St Louis
3h 37m
1 stop
BUF11:17 amBuffalo
Oct 13
BUF9:00 amBuffalo
5h 20m
1 stop
STL1:20 pmLambert-St Louis
$221
Delta
Aug 6
STL6:25 pmLambert-St Louis
4h 33m
1 stop
BUF11:58 pmBuffalo
Aug 11
BUF6:27 amBuffalo
4h 10m
1 stop
STL9:37 amLambert-St Louis
$260
Delta
Aug 6
MDW6:42 pmChicago Midway
4h 16m
1 stop
BUF11:58 pmBuffalo
Aug 11
BUF6:27 amBuffalo
3h 50m
1 stop
MDW9:17 amChicago Midway
$265

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 June 13, 2026.
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

Cheapest round-trip

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 7/1

6:00 am-2:55 pm

1 stop7h 55m

Buffalo

Fri 7/3

3:32 pm-9:30 pm

1 stop6h 58m

$153

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Tue 7/7

6:00 am-2:59 pm

1 stop7h 59m

Buffalo

Wed 7/8

3:55 pm-9:03 pm

1 stop6h 08m

$160

ChicagoBuffalo

ORD - BUF

ORDBUF

Chicago O'Hare Intl

Wed 8/19

9:39 am-6:51 pm

1 stop8h 12m

Buffalo

Tue 8/25

9:15 am-5:20 pm

1 stop9h 05m

$161

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 7/31

4:57 pm-11:33 am

1 stop17h 36m

Buffalo

Mon 8/10

2:48 pm-5:37 pm

1 stop27h 49m

$183

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Tue 8/4

6:34 pm-1:53 pm

1 stop18h 19m

Buffalo

Fri 8/7

2:48 pm-8:57 am

1 stop19h 09m

$186

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 9/30

6:40 am-11:17 am

1 stop3h 37m

Buffalo

Tue 10/13

9:00 am-1:20 pm

1 stop5h 20m

$221
Quickest round-trip

ChicagoBuffalo

MDW - BUF

MDWBUF

Chicago Midway

Wed 8/19

6:30 am-2:20 pm

1 stop6h 50m

Buffalo

Tue 8/25

6:25 pm-7:05 pm

Nonstop1h 40m

$231

MolineBuffalo

MLI - BUF

MLIBUF

Moline Quad-City

Wed 7/1

6:52 pm-12:38 am

1 stop4h 46m

Buffalo

Sat 7/4

6:00 am-10:58 am

1 stop5h 58m

$309

MolineBuffalo

MLI - BUF

MLIBUF

Moline Quad-City

Wed 7/1

6:52 pm-12:38 am

1 stop4h 46m

Buffalo

Sat 7/4

8:00 am-6:18 pm

2 stops11h 18m

$314

BloomingtonBuffalo

BMI - BUF

BMIBUF

Bloomington-Normal

Mon 6/29

4:19 pm-11:59 pm

1 stop6h 40m

Buffalo

Sat 7/11

6:00 am-11:23 am

1 stop6h 23m

$324

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 August, then book flights to Buffalo from Illinois during January instead. Flights to Buffalo in January, while not as cheap as those in August, still average around $98.

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 $317. Flights from Illinois to Buffalo on a Sunday will generally be more expensive and average around $405. 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 $318. 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 $366 per ticket.

What is the cheapest Illinois to Buffalo flight route?

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

How far in advance should I book a flight from Illinois 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 $344 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 $236 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

$145

Fastest flight time

1h 30m

Direct flights

Every day

Airports in Buffalo

1 airport
The best one-way flight to Buffalo from Illinois in the past 72 hours is $145. The best round-trip flight deal from Illinois to Buffalo found on momondo in the last 72 hours is $348.
The fastest flight from Illinois to Buffalo takes 1h 30m
Direct flights go from Illinois to Buffalo every day.
There is 1 airport in Buffalo. From Illinois there are direct flights to Buffalo (BUF).
Search flight deals

Frequently asked questions about flying from Illinois to Buffalo

  • 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
JetBluePriceFrom $98Free CancellationRating
7.1
2,980 reviews
Search JetBlue flights
American AirlinesPriceFrom $177Free CancellationRating
7.1
11,647 reviews
Search American Airlines flights
United AirlinesPriceFrom $206Free CancellationRating
7.4
9,813 reviews
Search United Airlines flights
SouthwestPriceFrom $249Free CancellationRating
7.9
4,234 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
Williamsville
Grand Island
Orchard Park
Bowmansville
West Seneca
Lockport
East Aurora
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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