Cheap flights from Chicago to Buffalo from $100 MDW, ORD → BUF
Chicago Midway International Airport (MDW), O'Hare International Airport (ORD) → Buffalo Niagara International Airport (BUF)
The cheapest one-way found recently is $100 with American Airlines, 23 Nov, found today.
- Cheapest one-way found recently
- $100, American Airlines, found today
- Cheapest month to fly
- November 2026, one-way fares from $100 found in the last 7 days
- Airlines with nonstop flights
- American Airlines, Southwest Airlines
- Shortest nonstop flight found
- 1 h 45 min
One-way
The cheapest one-way fare on each of 3 departure dates is usually $121 to $185.
Cheapest one-way found recently
$100
23 Nov · American Airlines
O'Hare International Airport (ORD) → Buffalo Niagara International Airport (BUF)
Leaves 8:00 a.m. · 1 h 45 min trip
nonstop
found today
Cheapest nonstop one-way
$100
23 Nov · American Airlines
O'Hare International Airport (ORD) → Buffalo Niagara International Airport (BUF)
Leaves 8:00 a.m. · 1 h 45 min trip
nonstop
found today
Found recently, and the cheapest we hold
$100 23 Novfound todayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 32 days, 26 Sept to 12 Nov, the cheapest one-way we saw each day was $78 to $281.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 18 Nov to 8 May 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 23 Nov to compare.
Every date we hold
5 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 18 Nov | $141 | Frontier Airlines | Chicago Midway International Airport (MDW) → Buffalo Niagara International Airport (BUF) | 1 stop | found 5 days ago | Open this trip |
| 23 Nov | $100 | American Airlines | O'Hare International Airport (ORD) → Buffalo Niagara International Airport (BUF) | nonstop | found today | Open this trip |
| 8 May 2027 | $228 | American Airlines | O'Hare International Airport (ORD) → Buffalo Niagara International Airport (BUF) | nonstop | found 2 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $100.
Airlines on the cheapest dates: American Airlines, Frontier Airlines.
Premium cabin fares from Chicago to Buffalo
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 23 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Chicago to Buffalo?
One-way
The cheapest fares were 0 to 6 days before departure.
From the cheapest one-way each day between 26 Sept and 12 Nov (32 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $98 | $86 | Cheapest seen | 15 |
| 7–13 days | $99 | $78 | +1% | 12 |
| 90–179 days | $165 | $165 | +68% | 9 |
| 180+ days | $222 | $222 | +127% | 7 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Chicago → Rochester
107 km from Buffalo
$247
6 Dec – 8 Dec · ORD → ROC · out nonstop, back nonstop
found 2 days ago
Chicago → Toronto
95 km from Buffalo
$641
30 Dec – 20 Jan 2027 · MDW → YYZ · out 1 stop, back 2 stops
found 3 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Chicago → Toronto
95 km from Buffalo
$149
$49 more than flying to Buffalo
23 May 2027 · ORD → YTZ · nonstop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 23 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from Chicago to Buffalo?
The cheapest one-way found recently is $100 with American Airlines, 23 Nov, found today. The cheapest one-way fare on each of 3 departure dates is usually $121 to $185.
What is the cheapest month to fly from Chicago to Buffalo?
November 2026 is the cheapest month for a one-way, from $100, 23 Nov, found today.
How far ahead should I book a flight from Chicago to Buffalo?
In 32 days of prices between 26 Sept and 12 Nov, one-way fares were cheapest 0 to 6 days before departure.
Is there a direct flight from Chicago to Buffalo?
Yes, the cheapest nonstop one-way found recently is $100 with American Airlines, 23 Nov, found today.
How long is the flight from Chicago to Buffalo?
The cheapest nonstop one-way found recently, with American Airlines on 23 Nov, takes 1 h 45 min from O'Hare International Airport (ORD) to Buffalo Niagara International Airport (BUF).
Which airlines have the cheapest flights from Chicago to Buffalo?
Between 18 Nov and 8 May 2027, American Airlines has the cheapest one-way on 2 of the 3 departure dates we hold, and Frontier Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work