Flights North America United States Ontario to United States

Cheap flights from Ontario to United States

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Easily compare round-trip flights from Ontario to United States

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to United States by changing tabs
Quickest
Cheapest
Major Airline
Major Airline
21 Feb
9:00 pm
ONT
Ontario airport
2h 25m
DEN
12:25 am
+1
Denver Intl airport
Major Airline
24 Feb
10:00 pm
DEN
Denver Intl airport
2h 25m
ONT
11:25 pm
Ontario airport
$104
Frontier
Frontier
09 Apr
9:00 pm
ONT
Ontario airport
2h 21m
DEN
12:21 am
+1
Denver Intl airport
Frontier
13 Apr
10:00 pm
DEN
Denver Intl airport
2h 28m
ONT
11:28 pm
Ontario airport
$108
Major Airline
Major Airline
21 Feb
9:00 pm
ONT
Ontario airport
2h 25m
DEN
12:25 am
+1
Denver Intl airport
Major Airline
23 Feb
10:00 pm
DEN
Denver Intl airport
2h 25m
ONT
11:25 pm
Ontario airport
$114
Alaska Airlines
Alaska Airlines
18 Feb
9:00 pm
ONT
Ontario airport
2h 45m
SEA
11:45 pm
Seattle/Tacoma Intl airport
Alaska Airlines
25 Feb
9:00 pm
SEA
Seattle/Tacoma Intl airport
2h 39m
ONT
11:39 pm
Ontario airport
$117
Major Airline
Major Airline
06 May
9:00 pm
ONT
Ontario airport
2h 21m
DEN
12:21 am
+1
Denver Intl airport
Major Airline
09 May
10:00 pm
DEN
Denver Intl airport
2h 28m
ONT
11:28 pm
Ontario airport
$128
United Airlines
United Airlines
01 Mar
9:00 pm
ONT
Ontario airport
2h 15m
DEN
12:15 am
+1
Denver Intl airport
United Airlines
05 Mar
10:00 pm
DEN
Denver Intl airport
2h 25m
ONT
11:25 pm
Ontario airport
$137
United Airlines
United Airlines
01 Mar
9:00 pm
ONT
Ontario airport
2h 15m
DEN
12:15 am
+1
Denver Intl airport
United Airlines
05 Mar
10:00 pm
DEN
Denver Intl airport
2h 25m
ONT
11:25 pm
Ontario airport
$137
Frontier
Frontier
09 Apr
9:00 pm
ONT
Ontario airport
2h 21m
DEN
12:21 am
+1
Denver Intl airport
Frontier
13 Apr
10:00 pm
DEN
Denver Intl airport
2h 28m
ONT
11:28 pm
Ontario airport
$108
Frontier
Frontier
23 Apr
9:00 pm
ONT
Ontario airport
2h 21m
DEN
12:21 am
+1
Denver Intl airport
Frontier
27 Apr
10:00 pm
DEN
Denver Intl airport
2h 28m
ONT
11:28 pm
Ontario airport
$137
Major Airline
Major Airline
06 May
9:00 pm
ONT
Ontario airport
2h 21m
DEN
12:21 am
+1
Denver Intl airport
Major Airline
09 May
10:00 pm
DEN
Denver Intl airport
2h 28m
ONT
11:28 pm
Ontario airport
$128
Frontier
Frontier
01 Jun
9:00 pm
ONT
Ontario airport
2h 26m
DEN
12:26 am
+1
Denver Intl airport
Frontier
04 Jun
10:00 pm
DEN
Denver Intl airport
2h 23m
ONT
11:23 pm
Ontario airport
$147
Major Airline
Major Airline
13 Mar
9:00 pm
ONT
Ontario airport
2h 21m
DEN
12:21 am
+1
Denver Intl airport
Major Airline
17 Mar
10:00 pm
DEN
Denver Intl airport
2h 28m
ONT
11:28 pm
Ontario airport
$163

Alternative routes for Ontario to United States

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Los Angeles to Las Vegas
Fastest flight time
0h 58m
Cheapest price
$46
San Diego to Las Vegas
Fastest flight time
1h 14m
Cheapest price
$58
San Diego to Phoenix
Fastest flight time
1h 23m
Cheapest price
$59
San Diego to Chicago
Fastest flight time
3h 57m
Cheapest price
$75
Los Angeles to Dallas
Fastest flight time
2h 55m
Cheapest price
$84
San Diego to Denver
Fastest flight time
2h 13m
Cheapest price
$85
San Diego to Houston
Fastest flight time
3h 05m
Cheapest price
$85
Los Angeles to San Francisco
Fastest flight time
1h 09m
Cheapest price
$86
Los Angeles to Denver
Fastest flight time
2h 14m
Cheapest price
$87
Palm Springs to Denver
Fastest flight time
2h 07m
Cheapest price
$87
Los Angeles to Houston
Fastest flight time
3h 07m
Cheapest price
$95
Los Angeles to New Orleans
Fastest flight time
3h 34m
Cheapest price
$95
Los Angeles to Orlando
Fastest flight time
4h 37m
Cheapest price
$95
Los Angeles to Chicago
Fastest flight time
3h 47m
Cheapest price
$95
Los Angeles to Fort Lauderdale
Fastest flight time
4h 45m
Cheapest price
$95
San Diego to Seattle
Fastest flight time
2h 50m
Cheapest price
$96
San Diego to San Francisco
Fastest flight time
1h 25m
Cheapest price
$97
San Diego to Los Angeles
Fastest flight time
0h 51m
Cheapest price
$99
Los Angeles to San Diego
Fastest flight time
0h 49m
Cheapest price
$99
Palm Springs to San Francisco
Fastest flight time
1h 37m
Cheapest price
$102
View more
*Flight prices to United States are based on prices for economy tickets found by momondo users during searches within the last 72 hours. These prices may no longer be available.
Flights North America United States Ontario to United States