Direct flights from Ontario to Seattle

Did you mean Flights from Seattle to Ontario?

Ontario

United States

ONT

Ontario International Airport

Seattle

United States

SEA

Seattle Tacoma International Airport

Route: Nonstop service available
Distance: 957 miles
Marketing airlines: 14 airlines
Aircraft: 12 aircraft types
Dates: Oct 19, 2026 – Oct 17, 2027

Observed award fares

A sample of one-way prices for one traveler from Roame’s fare cache. Points, fees, and seats describe the same observation. Availability can change; confirm with the loyalty program before transferring points.

Lowest price in this limited sample: 7,500 points + $5.00 for ONT → SEA, Economy, on 2026-11-14, booked with Alaska Atmos Rewards. This is an observed fare, not a guaranteed price or the lowest price across all dates and programs.

Departure window: 2026-10-23 – 2026-11-21.

ONT → SEAEconomy
AS607
7,500 points+ $5.00
Departure
2026-11-14
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-23 00:42
ONT → SEAEconomy
AS571
9,000 points+ $5.00
Departure
2026-11-12
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-21 15:59
ONT → SEAEconomy
AS594
9,000 points+ $5.00
Departure
2026-11-12
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-21 15:59
ONT → SEAEconomy
AS607
9,000 points+ $5.00
Departure
2026-11-12
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-21 15:59
ONT → SEAEconomy
AS607
9,000 points+ $5.00
Departure
2026-11-15
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-21 16:53
ONT → SEAEconomy
AS594
9,000 points+ $5.00
Departure
2026-11-20
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-22 12:11
ONT → SEAEconomy
AS571
10,000 points+ $5.00
Departure
2026-11-14
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-23 00:42
ONT → SEAEconomy
DL4070
11,000 points+ $5.00
Departure
2026-10-23
Seats seen
1
Book with
Virgin Atlantic
Observed (UTC)
2026-10-22 22:35
ONT → SEAEconomy
DL4031
11,000 points+ $5.00
Departure
2026-10-23
Seats seen
1
Book with
Virgin Atlantic
Observed (UTC)
2026-10-22 22:35
ONT → SEAEconomy
DL3816
11,000 points+ $5.00
Departure
2026-10-23
Seats seen
1
Book with
Virgin Atlantic
Observed (UTC)
2026-10-22 22:35
ONT → SEAEconomy
AS575
11,000 points+ $5.00
Departure
2026-11-12
Seats seen
7
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-21 15:59
ONT → SEAEconomy
AS607
11,000 points+ $5.00
Departure
2026-11-20
Seats seen
9
Book with
Alaska Atmos Rewards
Observed (UTC)
2026-10-22 12:11

Explore these booking programs

Search Alaska Atmos Rewards awards Alaska Atmos Rewards booking and transfer guide
Transfer partners in our directory: Bilt Rewards, Marriott Bonvoy, IHG Rewards, Choice Privileges. Check current eligibility and terms before transferring.
Search Virgin Atlantic awards Virgin Atlantic booking and transfer guide
Transfer partners in our directory: Amex Membership Rewards, Chase Ultimate Rewards, Citi ThankYou, Bilt Rewards, Marriott Bonvoy, Capital One, Wells Fargo, IHG Rewards. Check current eligibility and terms before transferring.

Ontario to Seattle route overview

Ontario International Airport (ONT) serves Ontario; Seattle Tacoma International Airport (SEA) serves Seattle.

The airports are 957 miles apart by great-circle distance.

Roame's current schedule feed shows nonstop service from ONT to SEA.

Marketing airlines listed in the current schedule, including codeshare sellers, are Air France (AF), Alaska Airlines (AS), Delta Air Lines (DL), Frontier Airlines (F9), Icelandair (FI), Japan Airlines (JL), Korean Air (KE), KLM (KL), Qatar Airways (QR), Scandinavian Airlines (SK), Virgin Atlantic (VS), Southwest Airlines (WN), WestJet (WS) and Volaris (Y4). This list does not identify the operating airline for each flight; check the flight details before booking.

Published schedule dates span Oct 19, 2026 – Oct 17, 2027.

Marketing airlines on the Ontario to Seattle route

These are marketing airlines, including codeshare sellers. This list does not identify the operating airline for each flight; check the flight details before booking.

Air France (AF)Codeshare only
Icelandair (FI)Codeshare only
Japan Airlines (JL)Codeshare only
Korean Air (KE)Codeshare only
KLM (KL)Codeshare only
Qatar Airways (QR)Codeshare only
Scandinavian Airlines (SK)Codeshare only
Virgin Atlantic (VS)Codeshare only
WestJet (WS)Codeshare only
Volaris (Y4)Codeshare only

Airline alliance affiliations represented: Oneworld, SkyTeam

Aircraft flying from ONT to SEA

Frequently asked questions

Which airports serve the Ontario to Seattle route?

Ontario International Airport (ONT) is the origin airport and Seattle Tacoma International Airport (SEA) is the destination airport.

How far is Seattle from Ontario?

ONT and SEA are approximately 957 miles apart by great-circle distance.

Are there direct flights from ONT to SEA?

Yes. Roame's current schedule feed shows nonstop service from ONT to SEA.

Which airlines market flights from ONT to SEA?

Which aircraft fly from ONT to SEA?

Aircraft listed in the current schedule include Airbus A220-300 (223), Airbus A320neo (32N), Airbus A321neo (32Q), Boeing 737-900 / Boeing 737-900ER (739), Boeing 737-700 / Boeing 737-700ER (73G), Boeing 737-800 Winglets (73H), Boeing 737-900 Winglets (73J), Boeing 737-700 Winglets (73W), Boeing 737 MAX 8 (7M8), 7S7, Embraer 175 (long wing) (E7W) and JET.