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Flights from Seattle to San Diego

Find flight deals from Seattle to San Diego for the next 3 months. Book one way flights from $76 or round trip flights from $129.

      • Cheapest nonstop
        SEA 4:52 PM
        2h 55m
        Nonstop
        SAN 7:47 PM
        Seattle - San Diego | Wed, Sep 2 | Alaska Airlines
        SAN 2:50 PM
        3h 1m
        Nonstop
        SEA 5:51 PM
        San Diego - Seattle | Wed, Sep 9 | Alaska Airlines
        $129 $191
        32% off
        32% off
        $191 $129
      • SEA 7:55 PM
        2h 54m
        Nonstop
        SAN 10:49 PM
        Seattle - San Diego | Tue, Sep 1 | Delta Air Lines
        SAN 4:11 PM
        2h 54m
        Nonstop
        SEA 7:05 PM
        San Diego - Seattle | Sat, Sep 5 | Delta Air Lines
        $132 $191
        31% off
        31% off
        $191 $132
      • SEA 9:45 AM
        2h 54m
        Nonstop
        SAN 12:39 PM
        Seattle - San Diego | Sat, Sep 5 | Delta Air Lines
        SAN 7:00 AM
        3h 5m
        Nonstop
        SEA 10:05 AM
        San Diego - Seattle | Tue, Sep 8 | Delta Air Lines
        $133 $191
        30% off
        30% off
        $191 $133
      • SEA 8:49 PM
        2h 55m
        Nonstop
        SAN 11:44 PM
        Seattle - San Diego | Sat, Sep 5 | Alaska Airlines
        SAN 7:15 AM
        3h 10m
        Nonstop
        SEA 10:25 AM
        San Diego - Seattle | Sun, Sep 6 | Alaska Airlines
        $138
        28% off
        $191 $138
      • SEA 7:40 AM
        2h 59m
        Nonstop
        SAN 10:39 AM
        Seattle - San Diego | Wed, Aug 26 | Alaska Airlines
        SAN 6:15 AM
        3h 5m
        Nonstop
        SEA 9:20 AM
        San Diego - Seattle | Wed, Sep 2 | Alaska Airlines
        $141
        26% off
        $191 $141
      • SEA 8:49 PM
        2h 55m
        Nonstop
        SAN 11:44 PM
        Seattle - San Diego | Mon, Aug 24 | Alaska Airlines
        SAN 8:33 PM
        3h 7m
        Nonstop
        SEA 11:40 PM
        San Diego - Seattle | Mon, Aug 31 | Alaska Airlines
        $141
        26% off
        $191 $141
      • SEA 7:50 PM
        2h 55m
        Nonstop
        SAN 10:45 PM
        Seattle - San Diego | Thu, Aug 20 | Alaska Airlines
        SAN 6:15 AM
        3h 5m
        Nonstop
        SEA 9:20 AM
        San Diego - Seattle | Tue, Aug 25 | Alaska Airlines
        $147
        23% off
        $191 $147
      • SEA 1:00 PM
        17h 25m
        1 stop
        SAN 2:00 PM
        Seattle - San Diego | Thu, Jul 23 | Normal Airline
        SAN 3:00 PM
        6h
        Nonstop
        SEA 4:00 PM
        San Diego - Seattle | Sat, Jul 25 | Normal Airline
        Find more flights
        Find more flights
      • SEA 2:37 PM
        9h 14m
        1 stop
        SAN 11:51 PM
        Seattle - San Diego | Wed, Aug 19 | Frontier Airlines
        $76 $116
        34% off
        34% off
        $116 $76
      • SEA 6:10 AM
        5h 47m
        1 stop
        SAN 11:57 AM
        Seattle - San Diego | Tue, Aug 25 | American Airlines
        $89 $116
        23% off
        23% off
        $116 $89
      • SEA 1:00 PM
        17h 25m
        1 stop
        SAN 2:00 PM
        Seattle - San Diego | Thu, Jul 23 | Normal Airline
        Find more flights
        Find more flights

Find cheap airlines flights from Seattle to San Diego

You can choose from 4 airlines that fly from Seattle to San Diego, including Alaska Airlines, Delta Air Lines, and United Airlines. Frontier Airlines has lowest fares on this route.
Alaska Airlines logo Alaska Airlines
Delta Air Lines logo Delta Air Lines
United Airlines logo United Airlines
American Airlines logo American Airlines
Airlines are determined based on actual purchased flight tickets from Seattle to San Diego according to previous 12 months data from Trip.com.

Flight Info | Seattle to San Diego

The distance between Seattle and San Diego is approximately 1,692.33 km. It takes around 3 hours on average to fly from Seattle to San Diego. Based on Trip.com's data travel demand peaks in July. The off-season for travel is November.

Cheapest one-way flight price $76
Cheapest round-trip ticket price $129
Off-season for travel November
Peak season for travel July
Flight distance 1,692.33 km
Average flight time 3 hours
Popular airline Alaska Airlines
Flight statistics for the Seattle–San Diego route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Seattle to San Diego

Which month has the cheapest one-way flights from Seattle to San Diego?

The average price of one-way flights from Seattle to San Diego purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Seattle to San Diego is December, with an average price of $162; while the month with the highest flight price is usually February, with an average price of up to $312.

$312
$237
$162
$87
    Cheapest
  • $211
    Jul
  • $281
    Aug
  • $209
    Sep
  • $219
    Oct
  • $241
    Nov
  • $162
    Dec
  • $230
    Jan
  • $312
    Feb
  • $194
    Mar
  • $206
    Apr
  • $188
    May
  • $240
    Jun

What is the cheapest month for round-trip flights from Seattle to San Diego?

Average price of round-trip flights from Seattle to San Diego purchased by Trip.com users by month over the past 12 months

According to historical data from Trip.com, the lowest prices for flights from Seattle to San Diego are found during February, with an average price of $242. Conversely, the highest prices are found during November, with an average price of up to $525.

$525
$384
$242
$101
    Cheapest
  • $303
    Jul
  • $288
    Aug
  • $288
    Sep
  • $247
    Oct
  • $525
    Nov
  • $408
    Dec
  • $294
    Jan
  • $242
    Feb
  • $389
    Mar
  • $410
    Apr
  • $378
    May
  • $334
    Jun

Frequently Asked Questions

  • What are the cheapest flights from Seattle to San Diego (SEA-SAN)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as $76 on Cheapest nonstop routes (e.g. SEA to SAN on Wed, Aug 19), while Alaska Airlines offers Cheapest nonstop round-trips from $129 departing on Wed, Sep 2 and returning on Wed, Sep 9.
  • At the moment, you can catch a nonstop flight from Seattle to San Diego with the following airlines, including: Alaska Airlines Delta Air Lines American Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 3 hours to fly from Seattle (SEA) to San Diego (SAN).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to San Diego is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 94 flight per week flying from Seattle to San Diego. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS1471 (07:59) Alaska Airlines: S/M/T/W/T/F/S -- AS1361 (06:28)
  • To find best deals on flights from Seattle to San Diego, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Aug 19, with one-way flights priced at just $76.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Diego travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to San Diego is November, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Seattle to San Diego on July 29, 2026 with Alaska Airlines, with prices starting at $149.
  • You can land at any one of the following hubs in San Diego, with Seattle-Tacoma International Airport to San Diego International Airport (SEA-SAN) is by far the most common option on this route: San Diego International Airport (SAN) McClellan-Palomar Airport (CLD) Marine Corps Air Station Miramar (NKX).
  • The time difference between San Diego and Seattle is 0h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.