Ontario (ONT) to Seattle (SEA), Nov 16, 2026: from $75 one way

Ontario (ONT) to Seattle (SEA), Nov 16, 2026: from $75 one way on Axel, checked Oct 29, 2026. Lowest published fare: $75 one way, Axel-exclusive, Frontier Airlines, nonstop, Nov 16, 2026, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Los Angeles to Seattle (SEA) flight deals

2026-11-16 · one way · Axel-exclusive $75.00

• Frontier Airlines F92275: ONT 2026-11-16 06:00:00 → SEA 2026-11-16 09:03:00; nonstop; 183 minutes. Local airport times.

2026-11-16 · one way · Axel-exclusive $135.00

• Alaska Airlines AS607: ONT 2026-11-16 06:00:00 → SEA 2026-11-16 08:51:00; nonstop; 171 minutes. Local airport times.

2026-11-16 · one way · Axel-exclusive $140.00

• Delta Air Lines DL4070: ONT 2026-11-16 11:57:00 → SEA 2026-11-16 14:56:00; nonstop; 179 minutes. Local airport times.

2026-11-16 · one way · Axel-exclusive $140.00

• Southwest Airlines WN1053 / WN4083: ONT 2026-11-16 17:00:00 → SEA 2026-11-16 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
  • WN1053: ONT 2026-11-16 17:00:00 → LAS 2026-11-16 18:05:00; layover at LAS: 85 minutes.
  • WN4083: LAS 2026-11-16 19:30:00 → SEA 2026-11-16 22:20:00.

2026-11-16 · one way · Axel-exclusive $150.00

• United Airlines UA2363 / UA2192: ONT 2026-11-16 06:00:00 → SEA 2026-11-16 12:18:00; 1 stop(s) via SFO; 378 minutes. Local airport times.
  • UA2363: ONT 2026-11-16 06:00:00 → SFO 2026-11-16 07:30:00; layover at SFO: 155 minutes.
  • UA2192: SFO 2026-11-16 10:05:00 → SEA 2026-11-16 12:18:00.

2026-11-16 · one way · Axel-exclusive $135.00

• Alaska Airlines AS575: ONT 2026-11-16 12:02:00 → SEA 2026-11-16 14:49:00; nonstop; 167 minutes. Local airport times.

2026-11-16 · one way · Axel-exclusive $140.00

• Delta Air Lines DL4031: ONT 2026-11-16 17:38:00 → SEA 2026-11-16 20:43:00; nonstop; 185 minutes. Local airport times.

2026-11-16 · one way · Axel-exclusive $140.00

• Southwest Airlines WN3326 / WN1586: ONT 2026-11-16 13:30:00 → SEA 2026-11-16 18:40:00; 1 stop(s) via SMF; 310 minutes. Local airport times.
  • WN3326: ONT 2026-11-16 13:30:00 → SMF 2026-11-16 14:55:00; layover at SMF: 105 minutes.
  • WN1586: SMF 2026-11-16 16:40:00 → SEA 2026-11-16 18:40:00.

2026-11-16 · one way · Axel-exclusive $140.00

• Southwest Airlines WN3313 / WN4608: ONT 2026-11-16 16:05:00 → SEA 2026-11-16 21:40:00; 1 stop(s) via OAK; 335 minutes. Local airport times.
  • WN3313: ONT 2026-11-16 16:05:00 → OAK 2026-11-16 17:30:00; layover at OAK: 110 minutes.
  • WN4608: OAK 2026-11-16 19:20:00 → SEA 2026-11-16 21:40:00.

2026-11-16 · one way · Axel-exclusive $145.00

• Alaska Airlines AS3380 / AS2016: ONT 2026-11-16 17:36:00 → SEA 2026-11-16 22:28:00; 1 stop(s) via BOI; 292 minutes. Local airport times.
  • AS3380: ONT 2026-11-16 17:36:00 → BOI 2026-11-16 20:41:00; layover at BOI: 66 minutes.
  • AS2016: BOI 2026-11-16 21:47:00 → SEA 2026-11-16 22:28:00.

2026-11-16 · one way · Axel-exclusive $150.00

• Delta Air Lines DL2708 / DL2995: ONT 2026-11-16 06:00:00 → SEA 2026-11-16 12:36:00; 1 stop(s) via SLC; 396 minutes. Local airport times.
  • DL2708: ONT 2026-11-16 06:00:00 → SLC 2026-11-16 08:49:00; layover at SLC: 146 minutes.
  • DL2995: SLC 2026-11-16 11:15:00 → SEA 2026-11-16 12:36:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

• All dates for this route
• Nov 15, 2026 · Return options
• Nov 17, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Ontario (ONT) to Seattle (SEA) · Nov 16, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
• Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
• If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Los Angeles to Seattle (SEA) flight deals · Flight search guide.
• Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.

Feedback (optional): Missing info · Axel issue