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Find the lowest ONT airfares by comparing hundreds of airlines and agencies.
Good to Know: Flights to ONT
Useful information for finding cheap flights to Ontario International and booking your next trip
Cheapest Round Trip Flight
$178
Southwest Airlines• 2 stops • 10h 50mApr 22 – Apr 24
The cheapest round trip flight from Valley International to Ontario International is currently $178
Cheapest One way Flight
$130
Frontier Airlines• 1 stop• 14h 19mApr 25
The cheapest one way flight from Orlando International to Ontario International is currently $130
Cheapest Direct Flight
$272
Southwest Airlines• nonstop• 5h 25mMay 10
The cheapest nonstop flight from William P Hobby to Ontario International is currently $272
Fastest Flight
5h 10m
The fastest nonstop flight from Dallas Love Field to Ontario International takes 5h 10m
Best Flight Deals to Ontario
Identify the most efficient round-trip flights to Ontario. We present options balancing cost and convenience for your return journey.
Apr 22 - Apr 24, Economy
Harlingen → Ontario
10h 50m
4:40 PM - 9:30 PM • 2 stops
Harlingen → Ontario
11h 50m
1:50 PM - 11:00 PM • 1 stop
Southwest Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
17h 25m
6:20 AM - 3:05 PM • 2 stops
Harlingen → Ontario
11h 40m
11:35 AM - 8:35 PM • 2 stops
Southwest Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
15h 43m
10:47 AM - 6:30 PM • 2 stops
Harlingen → Ontario
13h 38m
11:59 PM - 10:17 AM • 1 stop
American Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
9h 10m
2:47 PM - 6:37 PM • 1 stop
Harlingen → Ontario
18h 27m
6:15 AM - 7:22 PM • 2 stops
American Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
12h 15m
10:47 AM - 4:22 PM • 2 stops
Harlingen → Ontario
10h 17m
6:00 AM - 2:17 PM • 1 stop
American Airlines
For travel requiring no set return, access available one-way flights to Ontario (ONT). These options support extended stays or open-ended plans.
Need to travel to Ontario soon? View current last-minute flight options to ONT for spontaneous or pressing plans.
Apr 22 - Apr 24, Economy
Harlingen → Ontario
10h 50m
4:40 PM - 9:30 PM • 2 stops
Harlingen → Ontario
11h 50m
1:50 PM - 11:00 PM • 1 stop
Southwest Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
17h 25m
6:20 AM - 3:05 PM • 2 stops
Harlingen → Ontario
11h 40m
11:35 AM - 8:35 PM • 2 stops
Southwest Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
15h 43m
10:47 AM - 6:30 PM • 2 stops
Harlingen → Ontario
13h 38m
11:59 PM - 10:17 AM • 1 stop
American Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
9h 10m
2:47 PM - 6:37 PM • 1 stop
Harlingen → Ontario
18h 27m
6:15 AM - 7:22 PM • 2 stops
American Airlines
Apr 22 - Apr 24, Economy
Harlingen → Ontario
12h 15m
10:47 AM - 4:22 PM • 2 stops
Harlingen → Ontario
10h 17m
6:00 AM - 2:17 PM • 1 stop
American Airlines
Maximize your time in Ontario, not in transit. Discover non-stop direct flights to ONT for the quickest, most straightforward journey to the Strip.
May 10 - May 17, Economy
Houston → Ontario
5h 25m
1:55 PM - 3:20 PM • nonstop
Houston → Ontario
5h 10m
11:50 PM - 5:00 AM • nonstop
Southwest Airlines
May 14 - May 16, Economy
Dallas → Ontario
5h 10m
7:35 PM - 8:45 PM • nonstop
Dallas → Ontario
5h
5:00 AM - 10:00 AM • nonstop
Southwest Airlines
May 10 - May 17, Economy
Houston → Ontario
5h 35m
6:00 AM - 7:35 AM • nonstop
Houston → Ontario
5h 19m
8:06 PM - 1:25 AM • nonstop
Frontier Airlines
May 15 - May 17, Economy
Dallas → Ontario
5h 10m
7:35 PM - 8:45 PM • nonstop
Dallas → Ontario
4h 10m
6:10 AM - 11:00 AM • nonstop
Southwest Airlines
May 15 - May 17, Economy
Dallas → Ontario
5h 25m
5:46 PM - 7:11 PM • nonstop
Dallas → Ontario
5h 9m
8:30 AM - 1:39 PM • nonstop
Frontier Airlines
Destination Airport Information
| IATA Code | ONT |
| Name | Ontario International |
| City | Ontario |
| Country | US |
| Latitude | 34.055999755859375 |
| Longitude | -117.60099792480469 |
Popular Airlines
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