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
$279
Frontier Airlines• 1 stop • 13h 29mJun 05 – Jun 16
The cheapest round trip flight from George Bush Intercontinental Houston to Ontario International is currently $279
Cheapest One way Flight
$157
United Airlines• 2 stops• 28h 24mJun 08
The cheapest one way flight from George Bush Intercontinental Houston to Ontario International is currently $157
Cheapest Direct Flight
$307
Southwest Airlines• nonstop• 4h 15mJul 28
The cheapest nonstop flight from Austin Bergstrom International to Ontario International is currently $307
Fastest Flight
3h 35m
The fastest nonstop flight from Denver International to Ontario International takes 3h 35m
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.
Jun 05 - Jun 16, Economy
Houston → Ontario
13h 29m
5:40 PM - 11:49 PM • 1 stop
Houston → Ontario
5h 25m
5:43 PM - 11:08 PM • nonstop
Frontier Airlines
Jun 05 - Jun 16, Economy
Houston → Ontario
5h 38m
5:30 AM - 7:08 AM • nonstop
Houston → Ontario
5h 25m
5:43 PM - 11:08 PM • nonstop
Frontier Airlines
Dec 15 - Jan 26, Economy
London → Ontario
25h 54m
2:45 PM - 10:39 PM • 1 stop
London → Ontario
27h
12:00 PM - 12:20 PM • 1 stop
Alaska Airlines
Sep 01 - Sep 16, Economy
La Mesa → Ontario
38h 33m
1:30 PM - 11:43 AM • 2 stops
La Mesa → Ontario
48h 35m
6:15 AM - 12:30 PM • 2 stops
American Airlines
Sep 01 - Sep 16, Economy
La Mesa → Ontario
66h 56m
4:30 AM - 7:46 PM • 4 stops
La Mesa → Ontario
40h 53m
9:36 PM - 11:20 AM • 2 stops
Avianca
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.
Maximize your time in Ontario, not in transit. Discover non-stop direct flights to ONT for the quickest, most straightforward journey to the Strip.
Jul 28 - Aug 04, Economy
Austin → Ontario
4h 15m
2:30 PM - 3:25 PM • nonstop
Austin → Ontario
4h 15m
5:50 PM - 10:45 PM • nonstop
Southwest Airlines
Jun 05 - Jun 16, Economy
Houston → Ontario
5h 38m
5:30 AM - 7:08 AM • nonstop
Houston → Ontario
5h 25m
5:43 PM - 11:08 PM • nonstop
Frontier Airlines
Jun 11 - Jun 15, Economy
Denver → Ontario
3h 35m
10:55 AM - 12:10 PM • nonstop
Denver → Ontario
3h 35m
5:50 AM - 9:05 AM • nonstop
Southwest Airlines
Jun 11 - Jun 15, Economy
Denver → Ontario
3h 40m
9:15 PM - 10:35 PM • nonstop
Denver → Ontario
3h 30m
8:00 AM - 11:10 AM • nonstop
Southwest Airlines
Jun 11 - Jun 15, Economy
Denver → Ontario
3h 40m
6:45 PM - 8:05 PM • nonstop
Denver → Ontario
3h 30m
2:30 PM - 5:40 PM • nonstop
Southwest 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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