Flights to and from Ontario (ONT): 29 Nonstop Destinations

Ontario International Airport, Ontario, United States · nonstop from 25 cities

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International

5 nonstop destinations

Domestic

24 nonstop destinations

Nonstop service from

25 cities

Airlines Flying Nonstop from ONT

Who actually operates the nonstops from Ontario, from published airline schedules as of 25 August 2026— ranked by the number of destinations each airline serves without a stop. Pick an airline for its full list from the city; each destination below names its carriers.

Southwest Airlineseconomy only12 nonstop destinations Frontier Airlineseconomy only6 nonstop destinations Alaska Airlines5 nonstop destinations American Airlines4 nonstop destinations United Airlines4 nonstop destinations Delta Air Lines3 nonstop destinations Volariseconomy only3 nonstop destinations

Avianca El Salvador1 nonstop destination

China Airlines1 nonstop destination

JetBlueseasonal1 nonstop destination

Starlux Airlines1 nonstop destination

International Destinations from ONT

El Salvador

1 city

San SalvadorSALAvianca El Salvador

Mexico

3 cities

Del BajioBJXVolaris (economy)GuadalajaraGDLVolaris (economy)MoreliaMLMVolaris (economy)

Taiwan

1 city

TaipeiTPEChina Airlines, Starlux Airlines

Domestic Destinations from ONT

AtlantaATLDelta Air Lines AustinAUSSouthwest Airlines (economy)BoiseBOIAlaska Airlines CharlotteCLTAmerican Airlines ChicagoMDWSouthwest Airlines (economy)ChicagoORDAmerican Airlines, United Airlines DallasDALSouthwest Airlines (economy)DallasDFWAmerican Airlines, Frontier Airlines (economy)DenverDENFrontier Airlines (economy), Southwest Airlines (economy), United Airlines HonoluluHNLAlaska Airlines, Southwest Airlines (economy)HoustonHOUSouthwest Airlines (economy)HoustonIAHFrontier Airlines (economy), United Airlines Las VegasLASFrontier Airlines (economy), Southwest Airlines (economy)NashvilleBNASouthwest Airlines (economy)New YorkJFKJetBlue OaklandOAKSouthwest Airlines (economy)PhoenixPHXAmerican Airlines, Southwest Airlines (economy)PortlandPDXAlaska Airlines SacramentoSMFSouthwest Airlines (economy)Salt Lake CitySLCDelta Air Lines San FranciscoSFOFrontier Airlines (economy), United Airlines San JoseSJCSouthwest Airlines (economy)Santa RosaSTSAlaska Airlines SeattleSEAAlaska Airlines, Delta Air Lines, Frontier Airlines (economy)

ONT Nonstop Flights: Questions Answered

As of 25 August 2026, 11 airlines operate scheduled nonstop flights from Ontario International Airport (ONT). Ranked by nonstop destinations, the busiest are Southwest Airlines (12 destinations, economy only), Frontier Airlines (6, economy only), Alaska Airlines (5), American Airlines (4) and United Airlines (4).

Ontario International Airport has scheduled nonstop service to 29 destinations as of 25 August 2026: 5 international and 24 domestic. Nonstop flights arrive from 25 cities.

Nonstop flights into ONT depart from Atlanta (ATL), Austin (AUS), Bogota (BOG), Charlotte (CLT), Chicago (ORD), Cincinnati (CVG), Columbus (CMH) and Dallas (DFW) and 17 more cities as of 25 August 2026. Every one is a scheduled nonstop in the published airline schedules we track; we price the cabin on your dates before you book.

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