Which airlines fly to ONT?
7 airlines have inbound service to Ontario in the current dataset.
Airlines
7 carriers
Domestic origins
13 airports
International origins
1 airports
Top origin countries serving ONT on this page
- US: 13 origin airport matches
- MX: 1 origin airport match
Flight-number preview is shown for up to 8 routes per page.
Airlines flying to ONT
Southwest AirlinesSouthwest Airlines
American AirlinesAmerican Airlines
United AirlinesUnited Airlines
AeroMéxicoAeroMéxico
Delta Air LinesDelta Air Lines
VolarisVolaris
Alaska AirlinesAlaska Airlines
Origin airports
- United StatesChicago (MDW)
- United StatesDallas-Fort Worth (DFW)
- United StatesDenver (DEN)
- MexicoGuadalajara (GDL)
- United StatesHouston (IAH)
- United StatesLas Vegas (LAS)
- United StatesOakland (OAK)
- United StatesPhoenix (PHX)
- United StatesPortland (PDX)
- United StatesSacramento (SMF)
- United StatesSalt Lake City (SLC)
- United StatesSan Francisco (SFO)
- United StatesSan Jose (SJC)
- United StatesSeattle (SEA)
Inbound route details
Origin-country mix in this list:US 17/20MX 3/20
- Chicago (MDW) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest AirlinesFlight numbers: WN3874, WN2846, WN2798 - Dallas-Fort Worth (DFW) to Ontario (ONT)
Airline:
American AirlinesAmerican AirlinesFlight numbers: AA2255, AA2265, AA2262 - Denver (DEN) to Ontario (ONT)
Airline:
United AirlinesUnited AirlinesFlight numbers: UA430, UA1656, UA2028 - Denver (DEN) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest AirlinesFlight numbers: WN1660, WN189, WN1663 - Guadalajara (GDL) to Ontario (ONT)
Airline:
AeroMéxicoAeroMéxicoFlight numbers: Unavailable for this route - Guadalajara (GDL) to Ontario (ONT)
Airline:
Delta Air LinesDelta Air LinesFlight numbers: Unavailable for this route - Guadalajara (GDL) to Ontario (ONT)
Airline:
VolarisVolarisFlight numbers: Y41862, Y41860 - Houston (IAH) to Ontario (ONT)
Airline:
United AirlinesUnited AirlinesFlight numbers: UA1563 - Las Vegas (LAS) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest Airlines - Oakland (OAK) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest Airlines - Phoenix (PHX) to Ontario (ONT)
Airline:
American AirlinesAmerican Airlines - Phoenix (PHX) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest Airlines - Portland (PDX) to Ontario (ONT)
Airline:
American AirlinesAmerican Airlines - Portland (PDX) to Ontario (ONT)
Airline:
Alaska AirlinesAlaska Airlines - Sacramento (SMF) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest Airlines - Salt Lake City (SLC) to Ontario (ONT)
Airline:
Delta Air LinesDelta Air Lines - San Francisco (SFO) to Ontario (ONT)
Airline:
United AirlinesUnited Airlines - San Jose (SJC) to Ontario (ONT)
Airline:
Southwest AirlinesSouthwest Airlines - Seattle (SEA) to Ontario (ONT)
Airline:
American AirlinesAmerican Airlines - Seattle (SEA) to Ontario (ONT)
Airline:
Alaska AirlinesAlaska Airlines
Plan around ONT
Compare inbound and outbound coverage to evaluate connection opportunities, seasonal route depth, and airline mix before locking in your itinerary.
Frequently asked questions
How many origin airports connect to ONT?
On this page, 14 origin airports connect to ONT, including 13 domestic and 1 international origins.
How should I use this inbound route page for trip planning?
Use this page to identify feeder cities and airline options into one airport, then open city-pair route pages and map view to compare alternatives before booking.