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Good to Know: Cheapest and Fastest Flights from ONT
Useful information for finding cheap flights from Ontario International and booking your next trip
Cheapest Round Trip Flight
$391
Southwest Airlines
• 1 stop
• 10h 25m
Jul 18 – Jul 25
The cheapest round trip flight from Ontario to Portland (ONT-PDX-ONT) is currently $391
Cheapest One way Flight
$247
Delta Airlines
• 1 stop
• 13h 47m
Jul 22
The cheapest one way flight from Ontario to Chicago (ONT-MDW) is currently $247
Cheapest Direct Flight
$340
Frontier Airlines
• nonstop
• 3h 40m
Jul 18
The cheapest nonstop flight from Ontario to Portland (ONT-PDX) is currently $340
Fastest Flight
3h 35m
The fastest nonstop flight from Ontario to Portland (ONT-PDX) takes 3h 35m
Top Airlines Flying from Ontario International (ONT)
Most Recent Flight Deals from Ontario Now!
Compare and book low fare round-trip air tickets from Ontario. Ideal for travelers with confirmed return itineraries.
Jul 18 - Jul 25, Economy
Ontario → Portland
10h 25m
5:30 PM - 11:55 PM • 1 stop
Ontario → Portland
10h 25m
5:45 AM - 12:10 PM • 1 stop
Southwest Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
11h 44m
1:50 PM - 8:54 PM • 1 stop
Ontario → Portland
3h 48m
5:36 PM - 8:04 PM • nonstop
United Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
11h 44m
- • 1 stop
Ontario → Portland
3h 42m
- • nonstop
Alaska Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
37h 32m
11:59 PM - 10:51 PM • 1 stop
Ontario → Portland
10h 13m
3:31 PM - 9:44 PM • 1 stop
American Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
30h
4:20 PM - 10:20 AM • 1 stop
Ontario → Portland
6h 53m
11:16 AM - 3:29 PM • 1 stop
United Airlines
Explore competitive one-way airfare options from Ontario. Best suited for flexible or open-ended travel plans.
Access real-time availability on last-minute departures from Ontario. Tailored for urgent or short-notice travel requirements.
Jul 18 - Jul 25, Economy
Ontario → Portland
10h 25m
5:30 PM - 11:55 PM • 1 stop
Ontario → Portland
10h 25m
5:45 AM - 12:10 PM • 1 stop
Southwest Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
11h 44m
1:50 PM - 8:54 PM • 1 stop
Ontario → Portland
3h 48m
5:36 PM - 8:04 PM • nonstop
United Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
11h 44m
- • 1 stop
Ontario → Portland
3h 42m
- • nonstop
Alaska Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
37h 32m
11:59 PM - 10:51 PM • 1 stop
Ontario → Portland
10h 13m
3:31 PM - 9:44 PM • 1 stop
American Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
30h
4:20 PM - 10:20 AM • 1 stop
Ontario → Portland
6h 53m
11:16 AM - 3:29 PM • 1 stop
United Airlines
Discover direct flight options from Ontario (ONT). Save time by avoiding layovers and reaching your destination directly.
Jul 18 - Jul 25, Economy
Ontario → Portland
3h 40m
9:15 AM - 11:35 AM • nonstop
Ontario → Portland
3h 48m
5:36 PM - 8:04 PM • nonstop
Frontier Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
3h 35m
2:19 PM - 4:34 PM • nonstop
Ontario → Portland
3h 48m
5:36 PM - 8:04 PM • nonstop
Delta Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
3h 40m
10:00 AM - 12:20 PM • nonstop
Ontario → Portland
3h 48m
5:36 PM - 8:04 PM • nonstop
Delta Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
10h 2m
7:00 AM - 9:21 AM • nonstop
Ontario → Portland
35h 44m
7:36 AM - 9:56 AM • nonstop
Alaska Airlines
Jul 18 - Jul 25, Economy
Ontario → Portland
10h 2m
5:32 PM - 7:49 PM • nonstop
Ontario → Portland
35h 44m
7:36 AM - 9:56 AM • nonstop
Alaska Airlines
FAQs on Flights from Ontario (ONT)
Which airlines fly from Ontario?
Airlines flying the most from Ontario (ONT)
What are the most popular destination from Ontario ( ONT )?
Travelers frequently travel to Chicago, Chicago, Portland from Ontario
Airport Information: Ontario International (ONT)
- IATA Code
- ONT
- Name
- Ontario International
- City
- Ontario
- Country
- US
- Latitude
- 34.055999755859375
- Longitude
- -117.60099792480469
More Flight Options from Ontario, ONT
Flights from Ontario (ONT)
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to Phoenix (PHX)
Flights from Ontario (ONT)
to Phoenix (PHX)
Flights from Ontario (ONT)
to Seattle (SEA)
Flights from Ontario (ONT)
to Seattle (SEA)
Flights from Ontario (ONT)
to St Louis (STL)
Flights from Ontario (ONT)
to St Louis (STL)
Flights from Ontario (ONT)
to Portland (PDX)
Flights from Ontario (ONT)
to Portland (PDX)
Flights from Ontario (ONT)
to Nashville (BNA)
Flights from Ontario (ONT)
to Nashville (BNA)
Flights from Ontario (ONT)
to San Francisco (SFO)
Flights from Ontario (ONT)
to San Francisco (SFO)
Flights from Ontario (ONT)
to Pasco (PSC)
Flights from Ontario (ONT)
to Guadalajara (GDL)
Flights from Ontario (ONT)
to Guadalajara (GDL)
Flights from Ontario (ONT)
to Toronto (YYZ)
Flights from Ontario (ONT)
to Miami (MIA)
Flights from Ontario (ONT)
to Miami (MIA)
Flights from Phoenix (PHX)
to Ontario (ONT)
Flights from Phoenix (PHX)
to Ontario (ONT)
Flights from Seattle (SEA)
to Ontario (ONT)
Flights from Seattle (SEA)
to Ontario (ONT)
Flights from New York (LGA)
to Ontario (ONT)
Flights from New York (LGA)
to Ontario (ONT)
Flights from San Jose (SJC)
to Ontario (ONT)
Flights from Dallas (DFW)
to Ontario (ONT)
Flights from Dallas (DFW)
to Ontario (ONT)
Flights from Austin (AUS)
to Ontario (ONT)
Flights from Austin (AUS)
to Ontario (ONT)
Flights from Orlando (MCO)
to Ontario (ONT)
Flights from Orlando (MCO)
to Ontario (ONT)
Flights from Baltimore (BWI)
to Ontario (ONT)
Flights from Baltimore (BWI)
to Ontario (ONT)
Flights from Dallas (DAL)
to Ontario (ONT)
Flights from Dallas (DAL)
to Ontario (ONT)
Flights from Nashville (BNA)
to Ontario (ONT)
Flights from Nashville (BNA)
to Ontario (ONT)
Flights from Chicago (MDW)
to Ontario (ONT)
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