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Cheap flights Ontario — Chicago

Ontario (ONT, US) Chicago (MDW, US)
from $126 2 755 km ~3h 44m 13 flights found 2 airlines cheapest on Tuesday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $126 on 15.11.2026
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
Mo
Tu
We
Th
Fr
Sa
Su
December 2026
Mo
Tu
We
Th
Fr
Sa
Su
January 2027
Mo
Tu
We
Th
Fr
Sa
Su
Prices found for 5 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
16 Nov 2026, Mon
Frontier Airlines F9 1406
07:03
ONT Ontario International Airport
12:39
MDW Chicago Midway International Airport
5h 36m 1 stop
Farera
$126
View this ticket
14 Nov 2026, Sat
Southwest Airlines WN 3310
10:55
ONT Ontario International Airport
14:40
MDW Chicago Midway International Airport
3h 45m Direct
Farera
$149
View this ticket
18 Jan 2027, Mon
Frontier Airlines F9 1284
23:39
ONT Ontario International Airport
04:15
MDW Chicago Midway International Airport
4h 36m 1 stop
Trip.com
$171
View this ticket
14 Nov 2026, Sat
Southwest Airlines WN 1303
17:00
ONT Ontario International Airport
23:40
MDW Chicago Midway International Airport
6h 40m 1 stop
Farera
$177
View this ticket
18 Dec 2026, Fri
Southwest Airlines WN 3309
07:45
ONT Ontario International Airport
12:15
MDW Chicago Midway International Airport
4h 30m 1 stop
Farera
$181
View this ticket
16 Nov 2026, Mon
Southwest Airlines WN 3310
10:55
ONT Ontario International Airport
14:40
MDW Chicago Midway International Airport
3h 45m Direct
City.Travel
$213
View this ticket
Route characteristics
Distance
2 755 km
Flight time
3h 44m
Time difference
+2h
Minimum price
from $126 (15.11.2026)
Average price
$151
Maximum price
$181
Departures per week
1
Cheapest day
Tuesday
Departure airports (1)
ONT Ontario International Airport
Arrival airports (1)
MDW Chicago Midway International Airport
Airlines (2)
F9 Frontier Airlines WN Southwest Airlines
Agencies (3)
Farera Trip.com City.Travel
Prices by day of week
Monday
$126
avg $170
Friday
$181
avg $181
Saturday
$149
avg $163
Price trend by month
November 2026
from $126
avg $166
4 flights
December 2026
from $181
avg $181
1 flights
January 2027
from $171
avg $171
1 flights
Airlines — cheapest prices 2
Frontier Airlines
Frontier Airlines
Low-cost 5 flights · 5 days
$117
Southwest Airlines
Southwest Airlines
Low-cost 8 flights · 6 days
$149
Where to buy tickets 3
Farera
11 tickets · 6 days
from $117
Trip.com
1 tickets · 1 days
from $171
City.Travel
1 tickets · 1 days
from $213
Airports

From — Ontario (1)

  • ONT Ontario International Airport

To — Chicago (1)

  • MDW Chicago Midway International Airport
Other destinations from Ontario
Albuquerque
US
Accra
GH
Nantucket
US
Adelaide
AU
San Andres Island
CO
Malaga
ES · Hub
Auckland
NZ
Almaty
KZ
Alicante
ES
Ahmedabad
IN
Amsterdam
NL · Hub
Anchorage
US
Frequently asked questions about the route Ontario — Chicago
How long is the flight from Ontario to Chicago?
Approximate flight time — 3h 44m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Ontario to Chicago?
The straight-line distance — 2 755 km.
How much do flights from Ontario to Chicago cost?
The minimum price over 3 months — from $126 on 15.11.2026.
What is the average ticket price?
The average price — $151. Range: $126 — $181.
What is the time difference between Ontario and Chicago?
The difference — +2h.
From which airports does Ontario operate flights?
From Ontario: ONT (Ontario International Airport).
To which airports in Chicago do flights arrive?
To Chicago: MDW (Chicago Midway International Airport).
Which airlines fly this route?
This route is served by 2 airlines: Frontier Airlines, Southwest Airlines.
Are there direct flights?
Yes, there are direct flights. Minimum direct price — from $149. Total direct flights found: 2.
Which day of the week is cheapest?
The cheapest day of the week — Tuesday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Ontario — Chicago

Flights Ontario — Chicago is a popular route. The straight-line distance is 2 755 km. Flight time 3h 44m. Time difference +2h.

From Ontario (ONT) flights depart from 1 airport: ONT. To Chicago (MDW) — 1 arrival airport: MDW.

2 airlines operate on this route: Frontier Airlines, Southwest Airlines.

The minimum price for the next 3 months — from $126 (15.11.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $151, ranging from $126 to $181. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Tuesday.

Other destinations in United States from Ontario
Philadelphia
US
Oklahoma City
US
Omaha
US
Orlando
US
Everett
US
West Palm Beach
US
Portland
US
Palm Springs
US

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