Lowest Prices
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
$431
Frontier Airlines• nonstop • 5h 24mNov 23 – Nov 30
The cheapest round trip flight from Dallas Fort Worth International to Ontario International is currently $431
Cheapest One way Flight
$36
Frontier Airlines• nonstop• 4hNov 22
The cheapest one way flight from Seattle Tacoma International to Ontario International is currently $36
Cheapest Direct Flight
$303
Southwest Airlines• nonstop• 1h 55mNov 16
The cheapest nonstop flight from Norman Y. Mineta San Jose International to Ontario International is currently $303
Fastest Flight
1h 55m
The fastest nonstop flight from Norman Y. Mineta San Jose International to Ontario International takes 1h 55m
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.
Nov 23 - Nov 30, Economy
Dallas → Ontario
5h 24m
7:35 AM - 8:59 AM • nonstop
Dallas → Ontario
17h 22m
5:06 PM - 5:48 AM • 1 stop
Frontier Airlines
Nov 23 - Nov 30, Economy
Dallas → Ontario
11h 43m
9:23 AM - 2:26 PM • 1 stop
Dallas → Ontario
12h 34m
6:30 AM - 4:24 PM • 1 stop
Frontier Airlines
Nov 23 - Nov 30, Economy
Dallas → Ontario
12h 8m
6:00 AM - 11:28 AM • 1 stop
Dallas → Ontario
12h 34m
6:30 AM - 4:24 PM • 1 stop
Frontier Airlines
Nov 23 - Nov 30, Economy
Dallas → Ontario
9h 4m
12:25 PM - 4:09 PM • 1 stop
Dallas → Ontario
4h 18m
6:35 PM - 11:33 PM • nonstop
Delta Airlines
Nov 23 - Nov 30, Economy
Dallas → Ontario
9h 4m
12:25 PM - 4:09 PM • 1 stop
Dallas → Ontario
12h 34m
7:15 AM - 5:09 PM • 1 stop
Delta 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.
Nov 16 - Nov 16, Economy
San Jose → Ontario
5h 50m
6:30 AM - 10:20 AM • 1 stop
San Jose → Ontario
1h 55m
12:40 PM - 1:55 PM • nonstop
Southwest Airlines
Nov 16 - Nov 16, Economy
San Jose → Ontario
5h 15m
10:20 AM - 1:35 PM • 1 stop
San Jose → Ontario
7h
6:35 PM - 10:55 PM • 1 stop
Southwest 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.
Nov 16 - Nov 16, Economy
San Jose → Ontario
1h 55m
8:00 AM - 9:15 AM • nonstop
San Jose → Ontario
1h 55m
12:40 PM - 1:55 PM • nonstop
Southwest Airlines
Nov 23 - Nov 30, Economy
Dallas → Ontario
5h 24m
7:35 AM - 8:59 AM • nonstop
Dallas → Ontario
5h 3m
9:54 AM - 2:57 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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