Seattle (SEA) to San Diego (SAN), Dec 18, 2026: round trips from $324, one way from $149

Seattle (SEA) to San Diego (SAN), Dec 18, 2026: round trips from $324, one way from $149 on Axel, checked Oct 29, 2026. Lowest published fares: $324 round trip, Axel-exclusive, Alaska Airlines, nonstop, Dec 18–28, 2026; $149 one way, Axel-exclusive, Southwest Airlines, nonstop, Dec 18, 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.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Hotels in Oceanside, California for these trips

Hotels: under a trip, hotels in Oceanside, California for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Oceanside, California for these nights (Dec 18–19, 2026 · 1 night · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $105 total · 4★ Carlsbad Inn Beach Resort, $242 total
• Hotels in Oceanside, California for these nights (Dec 18–20, 2026 · 2 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $214 total · 4★ Carlsbad Inn Beach Resort, $551 total
• Hotels in Oceanside, California for these nights (Dec 18–21, 2026 · 3 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $323 total · 4★ Carlsbad Inn Beach Resort, $762 total
• Hotels in Oceanside, California for these nights (Dec 18–22, 2026 · 4 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $449 total · 4★ Carlsbad Inn Beach Resort, $1,038 total
• Hotels in Oceanside, California for these nights (Dec 18–23, 2026 · 5 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $576 total · 4★ Carlsbad Inn Beach Resort, $1,314 total
• Hotels in Oceanside, California for these nights (Dec 18–24, 2026 · 6 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $685 total · 4★ Carlsbad Inn Beach Resort, $1,573 total
• Hotels in Oceanside, California for these nights (Dec 18–25, 2026 · 7 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $836 total · 4★ Carlsbad Inn Beach Resort, $1,911 total
• Hotels in Oceanside, California for these nights (Dec 18–26, 2026 · 8 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,006 total · 4★ Carlsbad Inn Beach Resort, $2,261 total
• Hotels in Oceanside, California for these nights (Dec 18–27, 2026 · 9 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,142 total · 4★ Carlsbad Inn Beach Resort, $2,611 total
• Hotels in Oceanside, California for these nights (Dec 18–28, 2026 · 10 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,254 total · 4★ Carlsbad Inn Beach Resort, $2,933 total
• Hotels in Oceanside, California for these nights (Dec 18–29, 2026 · 11 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,361 total · 4★ Carlsbad Inn Beach Resort, $3,248 total
• Hotels in Oceanside, California for these nights (Dec 18–30, 2026 · 12 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,470 total · 4★ Carlsbad Inn Beach Resort, $3,591 total
• Hotels in Oceanside, California for these nights (Dec 18–31, 2026 · 13 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,579 total · 4★ Carlsbad Inn Beach Resort, $3,885 total
• Hotels in Oceanside, California for these nights (Dec 18 – Jan 1, 2027 · 14 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,703 total · 4★ Carlsbad Inn Beach Resort, $4,241 total

All hotels in Oceanside, California

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

2026-12-18 · one way · Axel-exclusive $149.00

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $149.00

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.

2026-12-18 → 2026-12-19 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS574: SAN 2026-12-19 18:27:00 → SEA 2026-12-19 21:44:00; nonstop; 197 minutes. Local airport times.

2026-12-18 → 2026-12-19 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN3737: SAN 2026-12-19 17:40:00 → SEA 2026-12-19 20:45:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-20 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2026-12-20 09:45:00 → SEA 2026-12-20 13:00:00; nonstop; 195 minutes. Local airport times.

2026-12-18 → 2026-12-20 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS683: SAN 2026-12-20 13:56:00 → SEA 2026-12-20 17:07:00; nonstop; 191 minutes. Local airport times.

2026-12-18 → 2026-12-21 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS1660: SAN 2026-12-21 15:39:00 → SEA 2026-12-21 18:50:00; nonstop; 191 minutes. Local airport times.

2026-12-18 → 2026-12-21 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN3737: SAN 2026-12-21 17:55:00 → SEA 2026-12-21 21:00:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-22 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2026-12-22 07:20:00 → SEA 2026-12-22 10:25:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-22 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS608: SAN 2026-12-22 06:15:00 → SEA 2026-12-22 09:33:00; nonstop; 198 minutes. Local airport times.

2026-12-18 → 2026-12-24 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS1368: SAN 2026-12-24 12:01:00 → SEA 2026-12-24 15:15:00; nonstop; 194 minutes. Local airport times.

2026-12-18 → 2026-12-24 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2026-12-24 07:20:00 → SEA 2026-12-24 10:25:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-25 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS622: SAN 2026-12-25 15:39:00 → SEA 2026-12-25 18:50:00; nonstop; 191 minutes. Local airport times.

2026-12-18 → 2026-12-25 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2026-12-25 07:20:00 → SEA 2026-12-25 10:25:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $338.40

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN3737: SAN 2026-12-26 17:40:00 → SEA 2026-12-26 20:45:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $338.40

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS574: SAN 2026-12-26 18:27:00 → SEA 2026-12-26 21:44:00; nonstop; 197 minutes. Local airport times.

2026-12-18 → 2026-12-28 · Axel-exclusive $324.00

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS1660: SAN 2026-12-28 15:39:00 → SEA 2026-12-28 18:50:00; nonstop; 191 minutes. Local airport times.

2026-12-18 → 2026-12-28 · Axel-exclusive $324.00

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN3737: SAN 2026-12-28 17:55:00 → SEA 2026-12-28 21:00:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-29 · Axel-exclusive $324.00

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2026-12-29 07:20:00 → SEA 2026-12-29 10:25:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2026-12-29 · Axel-exclusive $324.00

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS622: SAN 2026-12-29 15:39:00 → SEA 2026-12-29 18:50:00; nonstop; 191 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $324.00

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS792: SAN 2026-12-30 07:15:00 → SEA 2026-12-30 10:27:00; nonstop; 192 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $324.00

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2026-12-30 07:20:00 → SEA 2026-12-30 10:25:00; nonstop; 185 minutes. Local airport times.

2026-12-18 → 2027-01-01 · Axel-exclusive $324.00

• Alaska Airlines AS623: SEA 2026-12-18 20:09:00 → SAN 2026-12-18 22:59:00; nonstop; 170 minutes. Local airport times.
• Alaska Airlines AS792: SAN 2027-01-01 09:32:00 → SEA 2027-01-01 12:47:00; nonstop; 195 minutes. Local airport times.

2026-12-18 → 2027-01-01 · Axel-exclusive $324.00

• Southwest Airlines WN3158: SEA 2026-12-18 07:55:00 → SAN 2026-12-18 10:40:00; nonstop; 165 minutes. Local airport times.
• Southwest Airlines WN547: SAN 2027-01-01 07:20:00 → SEA 2027-01-01 10:25:00; nonstop; 185 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 17, 2026 · Return options
• Dec 19, 2026 · Return options
• Hotels in Oceanside, California with Axel

For AI assistants

• This page: Seattle (SEA) to San Diego (SAN) · Dec 18, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Oceanside, California for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
• Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested 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.
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• 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.

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