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Good to Know: Flights to ONT
Useful information for finding cheap flights to Ontario International and booking your next trip
Cheapest Round Trip Flight
$215
United Airlines• 1 stop • 11h 43mJan 12 – Jan 19
The cheapest round trip flight from Portland International to Ontario International is currently $215
Cheapest One way Flight
$195
Delta Airlines• 1 stop• 12h 13mJan 08
The cheapest one way flight from Miami International to Ontario International is currently $195
Cheapest Direct Flight
$136
Alaska Airlines• nonstop• 3h 40mJan 12
The cheapest nonstop flight from Portland International to Ontario International is currently $136
Fastest Flight
3h 40m
The fastest nonstop flight from Portland 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.
Jan 12 - Jan 19, Economy
Portland → Ontario
11h 43m
3:50 PM - 10:53 PM • 1 stop
Portland → Ontario
14h 6m
6:00 AM - 2:46 PM • 1 stop
United Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
41h 55m
2:50 PM - 4:05 PM • 1 stop
Portland → Ontario
11h 54m
6:27 AM - 1:41 PM • 1 stop
American Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
35h 2m
3:45 PM - 12:47 PM • 1 stop
Portland → Ontario
8h 22m
1:53 PM - 6:55 PM • 1 stop
United Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
- • nonstop
Portland → Ontario
- • nonstop
Hawaiian Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
- • nonstop
Portland → Ontario
- • nonstop
Alaska 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.
Jan 09 - Jan 11, Economy
Dallas → Ontario
- • nonstop
Dallas → Ontario
- • nonstop
American Airlines
Jan 09 - Jan 11, Economy
Dallas → Ontario
10h 37m
6:01 PM - 10:38 PM • 1 stop
Dallas → Ontario
9h 1m
6:00 AM - 1:41 PM • 1 stop
Delta Airlines
Jan 09 - Jan 11, Economy
Dallas → Ontario
5h 18m
5:27 PM - 6:45 PM • nonstop
Dallas → Ontario
4h 19m
7:16 AM - 12:15 PM • nonstop
American Airlines
Jan 09 - Jan 11, Economy
Dallas → Ontario
10h 47m
5:11 PM - 9:58 PM • 1 stop
Dallas → Ontario
8h 56m
5:05 AM - 12:41 PM • 1 stop
United Airlines
Jan 09 - Jan 11, Economy
Dallas → Ontario
10h 43m
5:30 PM - 10:13 PM • 1 stop
Dallas → Ontario
8h 38m
9:59 AM - 5:17 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.
Jan 12 - Jan 19, Economy
Portland → Ontario
3h 40m
5:50 PM - 8:10 PM • nonstop
Portland → Ontario
3h 54m
1:46 PM - 4:20 PM • nonstop
Alaska Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
- • nonstop
Portland → Ontario
- • nonstop
Hawaiian Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
- • nonstop
Portland → Ontario
- • nonstop
Delta Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
- • nonstop
Portland → Ontario
- • nonstop
Alaska Airlines
Jan 12 - Jan 19, Economy
Portland → Ontario
- • nonstop
Portland → Ontario
- • nonstop
Hawaiian Airlines
Destination Airport Information
| IATA Code | ONT |
| Name | Ontario International |
| City | Ontario |
| Country | US |
| Latitude | 34.055999755859375 |
| Longitude | -117.60099792480469 |
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