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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
$339
Southwest Airlines• 1 stop • 10h 10mMay 13 – May 16
The cheapest round trip flight from Salt Lake City International to Ontario International is currently $339
Cheapest One way Flight
$169
Southwest Airlines• 2 stops• 12h 30mMay 16
The cheapest one way flight from Reno Tahoe International to Ontario International is currently $169
Cheapest Direct Flight
$297
Southwest Airlines• nonstop• 4h 15mJul 28
The cheapest nonstop flight from Austin Bergstrom International to Ontario International is currently $297
Fastest Flight
3h 40m
The fastest nonstop flight from Denver International to Ontario International takes 3h 40m
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.
May 13 - May 16, Economy
Salt Lake City → Ontario
10h 10m
6:45 AM - 11:55 AM • 1 stop
Salt Lake City → Ontario
7h 20m
2:50 PM - 8:30 PM • 1 stop
Southwest Airlines
Nov 12 - Nov 12, Economy
Tampa → Ontario
12h
5:35 AM - 9:55 AM • 1 stop
Tampa → Ontario
7h 10m
10:50 PM - 6:20 AM • nonstop
Southwest Airlines
Nov 12 - Nov 12, Economy
Tampa → Ontario
12h 30m
6:00 AM - 10:50 AM • 1 stop
Tampa → Ontario
11h 50m
1:15 PM - 11:25 PM • 2 stops
Southwest Airlines
Nov 12 - Nov 12, Economy
Tampa → Ontario
13h 40m
7:10 AM - 12:30 PM • 1 stop
Tampa → Ontario
7h 12m
10:05 PM - 5:37 AM • nonstop
Delta Airlines
Nov 12 - Nov 12, Economy
Tampa → Ontario
13h 22m
1:20 PM - 6:22 PM • 1 stop
Tampa → Ontario
14h 14m
9:35 PM - 9:29 AM • 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.
May 13 - May 16, Economy
Salt Lake City → Ontario
10h 10m
6:45 AM - 11:55 AM • 1 stop
Salt Lake City → Ontario
7h 20m
2:50 PM - 8:30 PM • 1 stop
Southwest Airlines
May 13 - May 16, Economy
Salt Lake City → Ontario
7h 30m
1:15 PM - 5:05 PM • 1 stop
Salt Lake City → Ontario
10h 10m
10:15 AM - 5:25 PM • 1 stop
Southwest Airlines
May 13 - May 16, Economy
Salt Lake City → Ontario
6h 40m
6:45 PM - 9:45 PM • 1 stop
Salt Lake City → Ontario
9h 10m
2:50 PM - 9:40 PM • 1 stop
Southwest Airlines
May 13 - May 16, Economy
Salt Lake City → Ontario
7h
6:45 AM - 10:05 AM • 1 stop
Salt Lake City → Ontario
10h 10m
10:15 AM - 5:25 PM • 1 stop
Southwest Airlines
May 13 - May 16, Economy
Salt Lake City → Ontario
10h 31m
7:07 AM - 12:38 PM • 1 stop
Salt Lake City → Ontario
8h 56m
5:00 AM - 11:36 AM • 1 stop
United 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.
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
May 13 - May 16, Economy
Denver → Ontario
3h 40m
10:29 PM - 11:49 PM • nonstop
Denver → Ontario
3h 42m
6:00 AM - 9:22 AM • nonstop
Frontier Airlines
May 13 - May 16, Economy
Denver → Ontario
3h 43m
11:15 AM - 12:38 PM • nonstop
Denver → Ontario
3h 42m
5:00 AM - 8:22 AM • nonstop
United Airlines
May 15 - May 19, Economy
Denver → Ontario
3h 45m
9:15 PM - 10:40 PM • nonstop
Denver → Ontario
3h 35m
10:40 AM - 1:55 PM • nonstop
Southwest Airlines
May 12 - May 16, Economy
Denver → Ontario
3h 40m
8:55 AM - 10:15 AM • nonstop
Denver → Ontario
3h 40m
1:20 PM - 4:40 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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