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Ontario International Airport in Ontario, United States has 41 nonstop destinations in FlightQ's current schedule set. This page ranks named carriers by how many destinations they serve from ONT, with top routes and scheduled flight counts.
Schedule snapshot checked Jun 15, 2026.
The broadest named carrier from ONT is Southwest Airlines, with 15 nonstop destinations in this data set. Popular destinations from the airport include Denver (DEN), Seattle (SEA), Dallas (DFW), and Phoenix (PHX).
| Airline | Destinations | Flights | Top routes |
|---|---|---|---|
| Southwest Airlines | 15 | 247 | |
| Alaska Airlines | 6 | 71 | |
| Frontier Airlines | 6 | 54 | |
| West Air (USA) | 6 | 35 | |
| American Airlines | 4 | 69 | |
| United Airlines | 4 | 54 | |
| Delta Air Lines | 3 | 65 | |
| Volaris | 3 | 18 | |
| Empire Airlines | 2 | 8 | |
| China | 1 | 6 | |
| JetBlue Airways | 1 | 6 | |
| Starlux | 1 | 4 | |
| Avianca | 1 | 3 | |
| My Jet Xpress Airlines | 1 | 1 | |
| Sun Country Airlines | 1 | 1 |
Flight counts are the scheduled rows captured in the current sample window, not annual totals. The destination count is a better comparison for network breadth.
Southwest Airlines has the broadest named-carrier coverage in FlightQ's current ONT schedule set, with 15 nonstop destinations listed here.
FlightQ currently identifies 15 airlines serving 41 nonstop destinations from ONT.
Airlines add, pause, and retime routes seasonally. This page is built from FlightQ's current schedule capture, so use it for route research and confirm exact dates before booking.