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Route overview: San Diego to Seattle (SEA) flight deals

San Diego → Seattle

Dec 21, 2026 · one way

SAN → SEA1 adulteconomyOne way

12 flight options · 5 airlines

Nonstop flights

Mon, Dec 21 · One way

Southwest Airlines
5:55 pmSAN
3h 5m
Nonstop
9:00 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Alaska Airlines
7:15 amSAN
3h 12m
Nonstop
10:27 amSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Delta Air Lines
7:30 amSAN
3h 15m
Nonstop
10:45 amSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Southwest Airlines
7:20 amSAN
3h 5m
Nonstop
10:25 amSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Alaska Airlines
3:39 pmSAN
3h 11m
Nonstop
6:50 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Delta Air Lines
1:45 pmSAN
3h 12m
Nonstop
4:57 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Mon, Dec 21 · One way

Frontier Airlines
11:26 amSAN
5h 44m
LAS · 1h 10m
5:10 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

United Airlines
6:23 pmSAN
5h 21m
SFO · 1h 20m
11:44 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Alaska Airlines
5:19 pmSAN
5h 56m
PHX · 1h 18m
11:15 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Alaska Airlines
9:12 amSAN
5h 37m
EUG · 1h 35m
2:49 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

Alaska Airlines
4:26 pmSAN
5h 41m
OAK · 1h 41m
10:07 pmSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Dec 21 · One way

United Airlines
6:20 amSAN
5h 6m
LAX · 1h 2m
11:26 amSEA

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

SAN ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Explore this route

All dates for this routeDec 20, 2026 · Return optionsDec 22, 2026 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 · one waySouthwest AirlinesWN3737Axel-exclusive $194.602026-10-29T01:10:14Z
2026-12-21 · one wayAlaska AirlinesAS792Axel-exclusive $208.602026-10-29T01:10:14Z
2026-12-21 · one wayDelta Air LinesDL2530Axel-exclusive $208.602026-10-29T01:10:14Z
2026-12-21 · one wayFrontier AirlinesF91466 + F94203Axel-exclusive $124.602026-10-29T01:10:14Z
2026-12-21 · one wayUnited AirlinesUA1302 + UA1007Axel-exclusive $222.602026-10-29T01:10:14Z
2026-12-21 · one waySouthwest AirlinesWN547Axel-exclusive $194.602026-10-29T01:10:14Z
2026-12-21 · one wayAlaska AirlinesAS1660Axel-exclusive $208.602026-10-29T01:10:14Z
2026-12-21 · one wayDelta Air LinesDL2533Axel-exclusive $208.602026-10-29T01:10:14Z
2026-12-21 · one wayAlaska AirlinesAS2089 + AS612Axel-exclusive $194.602026-10-29T01:10:14Z
2026-12-21 · one wayAlaska AirlinesAS3102 + AS3023Axel-exclusive $194.602026-10-29T01:10:14Z
2026-12-21 · one wayAlaska AirlinesAS3100 + AS1359Axel-exclusive $194.602026-10-29T01:10:14Z
2026-12-21 · one wayUnited AirlinesUA2035 + UA726Axel-exclusive $222.602026-10-29T01:10:14Z

Route overview: San Diego to Seattle (SEA) flight deals

2026-12-21 · one way · Axel-exclusive $194.60

  • Southwest Airlines WN3737: SAN 2026-12-21 17:55:00 → SEA 2026-12-21 21:00:00; nonstop; 185 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $208.60

  • Alaska Airlines AS792: SAN 2026-12-21 07:15:00 → SEA 2026-12-21 10:27:00; nonstop; 192 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $208.60

  • Delta Air Lines DL2530: SAN 2026-12-21 07:30:00 → SEA 2026-12-21 10:45:00; nonstop; 195 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $124.60

  • Frontier Airlines F91466 / F94203: SAN 2026-12-21 11:26:00 → SEA 2026-12-21 17:10:00; 1 stop(s) via LAS; 344 minutes. Local airport times.
    • F91466: SAN 2026-12-21 11:26:00 → LAS 2026-12-21 13:01:00; layover at LAS: 70 minutes.
    • F94203: LAS 2026-12-21 14:11:00 → SEA 2026-12-21 17:10:00.

2026-12-21 · one way · Axel-exclusive $222.60

  • United Airlines UA1302 / UA1007: SAN 2026-12-21 18:23:00 → SEA 2026-12-21 23:44:00; 1 stop(s) via SFO; 321 minutes. Local airport times.
    • UA1302: SAN 2026-12-21 18:23:00 → SFO 2026-12-21 20:10:00; layover at SFO: 80 minutes.
    • UA1007: SFO 2026-12-21 21:30:00 → SEA 2026-12-21 23:44:00.

2026-12-21 · one way · Axel-exclusive $194.60

  • Southwest Airlines WN547: SAN 2026-12-21 07:20:00 → SEA 2026-12-21 10:25:00; nonstop; 185 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $208.60

  • Alaska Airlines AS1660: SAN 2026-12-21 15:39:00 → SEA 2026-12-21 18:50:00; nonstop; 191 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $208.60

  • Delta Air Lines DL2533: SAN 2026-12-21 13:45:00 → SEA 2026-12-21 16:57:00; nonstop; 192 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $194.60

  • Alaska Airlines AS2089 / AS612: SAN 2026-12-21 17:19:00 → SEA 2026-12-21 23:15:00; 1 stop(s) via PHX; 356 minutes. Local airport times.
    • AS2089: SAN 2026-12-21 17:19:00 → PHX 2026-12-21 19:40:00; layover at PHX: 78 minutes.
    • AS612: PHX 2026-12-21 20:58:00 → SEA 2026-12-21 23:15:00.

2026-12-21 · one way · Axel-exclusive $194.60

  • Alaska Airlines AS3102 / AS3023: SAN 2026-12-21 09:12:00 → SEA 2026-12-21 14:49:00; 1 stop(s) via EUG; 337 minutes. Local airport times.
    • AS3102: SAN 2026-12-21 09:12:00 → EUG 2026-12-21 11:57:00; layover at EUG: 95 minutes.
    • AS3023: EUG 2026-12-21 13:32:00 → SEA 2026-12-21 14:49:00.

2026-12-21 · one way · Axel-exclusive $194.60

  • Alaska Airlines AS3100 / AS1359: SAN 2026-12-21 16:26:00 → SEA 2026-12-21 22:07:00; 1 stop(s) via OAK; 341 minutes. Local airport times.
    • AS3100: SAN 2026-12-21 16:26:00 → OAK 2026-12-21 18:15:00; layover at OAK: 101 minutes.
    • AS1359: OAK 2026-12-21 19:56:00 → SEA 2026-12-21 22:07:00.

2026-12-21 · one way · Axel-exclusive $222.60

  • United Airlines UA2035 / UA726: SAN 2026-12-21 06:20:00 → SEA 2026-12-21 11:26:00; 1 stop(s) via LAX; 306 minutes. Local airport times.
    • UA2035: SAN 2026-12-21 06:20:00 → LAX 2026-12-21 07:25:00; layover at LAX: 62 minutes.
    • UA726: LAX 2026-12-21 08:27:00 → SEA 2026-12-21 11:26:00.

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For AI assistants

  • This page: San Diego (SAN) to Seattle (SEA) · Dec 21, 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: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • 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 San Diego 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.