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Cheap flights Chicago — Ontario

Chicago (MDW, US) Ontario (ONT, US)
from $118 2 755 km ~3h 44m 17 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: $118 on 22.01.2027
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 14 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
22 Jan 2027, Fri
Southwest Airlines WN 2641
00:45
MDW Chicago Midway International Airport
05:10
ONT Ontario International Airport
4h 25m Direct
Farera
$118
View this ticket
24 Nov 2026, Tue
Southwest Airlines WN 2949
06:55
MDW Chicago Midway International Airport
12:15
ONT Ontario International Airport
5h 20m 1 stop
Farera
$131
View this ticket
07 Dec 2026, Mon
Frontier Airlines F9 2999
19:40
MDW Chicago Midway International Airport
02:51
ONT Ontario International Airport
7h 11m 2 stops
Flightnetwork
$153
View this ticket
26 Nov 2026, Thu
Frontier Airlines F9 1458
05:42
MDW Chicago Midway International Airport
15:42
ONT Ontario International Airport
10h 3 stops
Gotogate
$213
View this ticket
25 Nov 2026, Wed
Southwest Airlines WN 2987
20:00
MDW Chicago Midway International Airport
00:20
ONT Ontario International Airport
4h 20m Direct
Farera
$228
View this ticket
15 Nov 2026, Sun
Southwest Airlines WN 2950
16:25
MDW Chicago Midway International Airport
00:30
ONT Ontario International Airport
8h 5m 1 stop
Farera
$246
View this ticket
Route characteristics
Distance
2 755 km
Flight time
3h 44m
Time difference
-2h
Minimum price
from $118 (22.01.2027)
Average price
$190
Maximum price
$252
Departures per week
1
Cheapest day
Tuesday
Departure airports (1)
MDW Chicago Midway International Airport
Arrival airports (1)
ONT Ontario International Airport
Airlines (2)
F9 Frontier Airlines WN Southwest Airlines
Agencies (5)
Farera Trip.com Flightnetwork Clickavia Gotogate
Prices by day of week
Monday
$153
avg $153
Tuesday
$131
avg $131
Cheapest
Wednesday
$228
avg $228
Thursday
$213
avg $213
Friday
$118
avg $118
Sunday
$246
avg $246
Price trend by month
November 2026
from $131
avg $205
4 flights
December 2026
from $153
avg $153
1 flights
January 2027
from $118
avg $118
1 flights
Airlines — cheapest prices 2
Frontier Airlines
Frontier Airlines
Low-cost 6 flights · 5 days
$111
Southwest Airlines
Southwest Airlines
Low-cost 11 flights · 9 days
$118
Where to buy tickets 5
Farera
11 tickets · 7 days
from $111
Trip.com
2 tickets · 2 days
from $126
Flightnetwork
1 tickets · 1 days
from $153
Clickavia
2 tickets · 2 days
from $209
Gotogate
1 tickets · 1 days
from $213
Airports

From — Chicago (1)

  • MDW Chicago Midway International Airport

To — Ontario (1)

  • ONT Ontario International Airport
Other destinations from Chicago
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Austin
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Hartford
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Birmingham
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Leon/Guanajuato
MX
Branson
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Nashville
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Boston
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Buffalo
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Baltimore
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Frequently asked questions about the route Chicago — Ontario
How long is the flight from Chicago to Ontario?
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 Chicago to Ontario?
The straight-line distance — 2 755 km.
How much do flights from Chicago to Ontario cost?
The minimum price over 3 months — from $118 on 22.01.2027.
What is the average ticket price?
The average price — $190. Range: $118 — $252.
What is the time difference between Chicago and Ontario?
The difference — -2h.
From which airports does Chicago operate flights?
From Chicago: MDW (Chicago Midway International Airport).
To which airports in Ontario do flights arrive?
To Ontario: ONT (Ontario 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 $118. 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 Chicago — Ontario

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

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

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

The minimum price for the next 3 months — from $118 (22.01.2027). The cheapest dates are highlighted in the calendar above.

The average ticket price — $190, ranging from $118 to $252. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Tuesday.

Other destinations in United States from Chicago
Omaha
US
Providence
US
Pittsburgh
US
Phoenix
US
Philadelphia
US
Portland
US
Norfolk
US
New Orleans
US

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