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Route overview: Seattle area (Sea-Tac and Paine Field) to San Diego (SAN) flight deals

Seattle → San Diego

Dec 13, 2026 · return Dec 16, 2026

SEA → SAN1 adulteconomyRound trip

11 flight options · 4 airlines

Nonstop flights

Sun, Dec 13 – Wed, Dec 16

Southwest Airlines
7:55 amSEA
2h 45m
Nonstop
10:40 amSAN
Southwest Airlines
5:55 pmSAN
3h 5m
Nonstop
9:00 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
6:57 pmSEA
2h 47m
Nonstop
9:44 pmSAN
Alaska Airlines
2:55 pmSAN
3h 9m
Nonstop
6:04 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Delta Air Lines
7:59 pmSEA
2h 53m
Nonstop
10:52 pmSAN
Delta Air Lines
3:53 pmSAN
3h 8m
Nonstop
7:01 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
3:00 pmSEA
2h 45m
Nonstop
5:45 pmSAN
Alaska Airlines
2:55 pmSAN
3h 9m
Nonstop
6:04 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Delta Air Lines
3:00 pmSEA
2h 50m
Nonstop
5:50 pmSAN
Delta Air Lines
3:53 pmSAN
3h 8m
Nonstop
7:01 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Sun, Dec 13 – Wed, Dec 16

United Airlines
7:30 pmSEA
4h 49m
SFO · 1h
12:19 am+1SAN
United Airlines
6:20 amSAN
5h 6m
LAX · 1h 2m
11:26 amSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Southwest Airlines
12:35 pmSEA
5h 10m
SJC · 1h 25m
5:45 pmSAN
Southwest Airlines
5:55 pmSAN
3h 5m
Nonstop
9:00 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
4:35 pmSEA
5h 15m
SMF · 1h 47m
9:50 pmSAN
Alaska Airlines
2:55 pmSAN
3h 9m
Nonstop
6:04 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
6:13 pmSEA
5h 1m
SFO · 1h 3m
11:14 pmSAN
Alaska Airlines
2:55 pmSAN
3h 9m
Nonstop
6:04 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
10:06 amSEA
5h 6m
STS · 1h 8m
3:12 pmSAN
Alaska Airlines
2:55 pmSAN
3h 9m
Nonstop
6:04 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
12:22 pmSEA
5h 2m
PDX · 1h 27m
5:24 pmSAN
Alaska Airlines
2:55 pmSAN
3h 9m
Nonstop
6:04 pmSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ SAN

Economy

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

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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeDec 12, 2026 → Dec 15, 2026Dec 14, 2026 → Dec 17, 2026Hotels in Oceanside, California 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.

Live price for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the flights there to get the current bookable total; the listed prices are the ones issued at the times shown.

Route overview: Seattle area (Sea-Tac and Paine Field) to San Diego (SAN) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-13 → 2026-12-16Southwest AirlinesWN3158 / WN3737$288.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Alaska AirlinesAS791 / AS1660$288.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Delta Air LinesDL2672 / DL2572$308.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16United AirlinesUA737 + UA1389 / UA2035 + UA726$328.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Alaska AirlinesAS765 / AS1660$288.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Delta Air LinesDL2150 / DL2572$308.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Southwest AirlinesWN2179 + WN429 / WN3737$278.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Alaska AirlinesAS764 + AS2368 / AS1660$298.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Alaska AirlinesAS1780 + AS661 / AS1660$298.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Alaska AirlinesAS1321 + AS3164 / AS1660$298.002026-10-29T02:06:33Z
2026-12-13 → 2026-12-16Alaska AirlinesAS488 + AS1320 / AS1660$298.002026-10-29T02:06:33Z

2026-12-13 → 2026-12-16 · $288.00

  • Southwest Airlines WN3158: SEA 2026-12-13 07:55:00 → SAN 2026-12-13 10:40:00; nonstop; 165 minutes. Local airport times.
  • Southwest Airlines WN3737: SAN 2026-12-16 17:55:00 → SEA 2026-12-16 21:00:00; nonstop; 185 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $288.00

  • Alaska Airlines AS791: SEA 2026-12-13 18:57:00 → SAN 2026-12-13 21:44:00; nonstop; 167 minutes. Local airport times.
  • Alaska Airlines AS1660: SAN 2026-12-16 14:55:00 → SEA 2026-12-16 18:04:00; nonstop; 189 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $308.00

  • Delta Air Lines DL2672: SEA 2026-12-13 19:59:00 → SAN 2026-12-13 22:52:00; nonstop; 173 minutes. Local airport times.
  • Delta Air Lines DL2572: SAN 2026-12-16 15:53:00 → SEA 2026-12-16 19:01:00; nonstop; 188 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $328.00

  • United Airlines UA737 / UA1389: SEA 2026-12-13 19:30:00 → SAN 2026-12-14 00:19:00; 1 stop(s) via SFO; 289 minutes. Local airport times.
    • UA737: SEA 2026-12-13 19:30:00 → SFO 2026-12-13 21:42:00; layover at SFO: 60 minutes.
    • UA1389: SFO 2026-12-13 22:42:00 → SAN 2026-12-14 00:19:00.
  • United Airlines UA2035 / UA726: SAN 2026-12-16 06:20:00 → SEA 2026-12-16 11:26:00; 1 stop(s) via LAX; 306 minutes. Local airport times.
    • UA2035: SAN 2026-12-16 06:20:00 → LAX 2026-12-16 07:25:00; layover at LAX: 62 minutes.
    • UA726: LAX 2026-12-16 08:27:00 → SEA 2026-12-16 11:26:00.

2026-12-13 → 2026-12-16 · $288.00

  • Alaska Airlines AS765: SEA 2026-12-13 15:00:00 → SAN 2026-12-13 17:45:00; nonstop; 165 minutes. Local airport times.
  • Alaska Airlines AS1660: SAN 2026-12-16 14:55:00 → SEA 2026-12-16 18:04:00; nonstop; 189 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $308.00

  • Delta Air Lines DL2150: SEA 2026-12-13 15:00:00 → SAN 2026-12-13 17:50:00; nonstop; 170 minutes. Local airport times.
  • Delta Air Lines DL2572: SAN 2026-12-16 15:53:00 → SEA 2026-12-16 19:01:00; nonstop; 188 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $278.00

  • Southwest Airlines WN2179 / WN429: SEA 2026-12-13 12:35:00 → SAN 2026-12-13 17:45:00; 1 stop(s) via SJC; 310 minutes. Local airport times.
    • WN2179: SEA 2026-12-13 12:35:00 → SJC 2026-12-13 14:55:00; layover at SJC: 85 minutes.
    • WN429: SJC 2026-12-13 16:20:00 → SAN 2026-12-13 17:45:00.
  • Southwest Airlines WN3737: SAN 2026-12-16 17:55:00 → SEA 2026-12-16 21:00:00; nonstop; 185 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $298.00

  • Alaska Airlines AS764 / AS2368: SEA 2026-12-13 16:35:00 → SAN 2026-12-13 21:50:00; 1 stop(s) via SMF; 315 minutes. Local airport times.
    • AS764: SEA 2026-12-13 16:35:00 → SMF 2026-12-13 18:24:00; layover at SMF: 107 minutes.
    • AS2368: SMF 2026-12-13 20:11:00 → SAN 2026-12-13 21:50:00.
  • Alaska Airlines AS1660: SAN 2026-12-16 14:55:00 → SEA 2026-12-16 18:04:00; nonstop; 189 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $298.00

  • Alaska Airlines AS1780 / AS661: SEA 2026-12-13 18:13:00 → SAN 2026-12-13 23:14:00; 1 stop(s) via SFO; 301 minutes. Local airport times.
    • AS1780: SEA 2026-12-13 18:13:00 → SFO 2026-12-13 20:33:00; layover at SFO: 63 minutes.
    • AS661: SFO 2026-12-13 21:36:00 → SAN 2026-12-13 23:14:00.
  • Alaska Airlines AS1660: SAN 2026-12-16 14:55:00 → SEA 2026-12-16 18:04:00; nonstop; 189 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $298.00

  • Alaska Airlines AS1321 / AS3164: SEA 2026-12-13 10:06:00 → SAN 2026-12-13 15:12:00; 1 stop(s) via STS; 306 minutes. Local airport times.
    • AS1321: SEA 2026-12-13 10:06:00 → STS 2026-12-13 12:18:00; layover at STS: 68 minutes.
    • AS3164: STS 2026-12-13 13:26:00 → SAN 2026-12-13 15:12:00.
  • Alaska Airlines AS1660: SAN 2026-12-16 14:55:00 → SEA 2026-12-16 18:04:00; nonstop; 189 minutes. Local airport times.

2026-12-13 → 2026-12-16 · $298.00

  • Alaska Airlines AS488 / AS1320: SEA 2026-12-13 12:22:00 → SAN 2026-12-13 17:24:00; 1 stop(s) via PDX; 302 minutes. Local airport times.
    • AS488: SEA 2026-12-13 12:22:00 → PDX 2026-12-13 13:24:00; layover at PDX: 87 minutes.
    • AS1320: PDX 2026-12-13 14:51:00 → SAN 2026-12-13 17:24:00.
  • Alaska Airlines AS1660: SAN 2026-12-16 14:55:00 → SEA 2026-12-16 18:04:00; nonstop; 189 minutes. Local airport times.

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For AI assistants

  • This page: Seattle (SEA) to San Diego (SAN) · Dec 13, 2026 · return Dec 16, 2026: 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 Seattle area (Sea-Tac and Paine Field) to San Diego (SAN) 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. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. 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.