Flight Route
Seattle to Ontario
SEA → ONT
Airlines
2 operating direct
Direct Flights
Available
Origin
Seattle–Tacoma International Airport
Destination
Ontario International Airport
Connection Options
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+2 moreTransit countries:
Direct
Connection
Route Options
Direct
Direct
1 Stop
via PDX
via SMF
via SJC
via OAK
via SFO
via LAS
via SLC
via PHX
via DEN
via DFW
via IAH
via MDW
2 Stops
via PDX + SMF
via PDX + SJC
via PDX + OAK
via EUG + OAK
via PDX + SFO
via MFR + SFO
via EUG + SFO
Airlines Flying Direct
Alaska
ASALASKA
Direct
American
AAUnited States
DirectCodeshare
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Average flight prices from SEA to ONT by month
Flight Delayed or Cancelled?
You may be entitled to up to €600 in compensation for flight disruptions on your SEA to ONT route.
- Delayed by 3+ hours
- Cancelled flight
- Denied boarding
- Claims valid up to 3 years back
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