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.
Departure window: through .
| Route / flight | Departure | Cabin | Book with | Points | Fees (USD) | Seats seen | Observed (UTC) |
|---|---|---|---|---|---|---|---|
| ONT → SEA AS592 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS575 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS607 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS607 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS475 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS575 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS475 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS607 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA AS575 | Economy | Alaska Atmos Rewards | 7,500 | $5.00 | 9 | ||
| ONT → SEA DL4031 | Economy | Virgin Atlantic | 11,000 | $5.00 | 1 | ||
| ONT → SEA DL3816 | Economy | Virgin Atlantic | 11,000 | $5.00 | 1 | ||
| ONT → SEA DL4070 | Economy | Virgin Atlantic | 11,000 | $5.00 | 1 |
Did you mean Flights from Seattle to Ontario?
Ontario
United StatesONT
Ontario International Airport
Seattle
United StatesSEA
Seattle Tacoma International Airport
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 Sep 21, 2026 – Sep 19, 2027.
These are marketing airlines, including codeshare sellers. This list does not identify the operating airline for each flight; check the flight details before booking.
Airline alliance affiliations represented: Oneworld, SkyTeam
Ontario International Airport (ONT) is the origin airport and Seattle Tacoma International Airport (SEA) is the destination airport.
ONT and SEA are approximately 957 miles apart by great-circle distance.
Yes. 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.
Aircraft listed in the current schedule include Airbus A220-300 (223), Airbus A321 (321), 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.