Question 1

What airlines fly to San Diego?

Accepted Answer

Alaska Airlines, Delta and Frontier are the top three most popular airlines that fly to San Diego from Seattle according to our data. Alaska Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 8 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

Question 2

What is the cheapest month to fly to San Diego?

Accepted Answer

If you are unable to visit San Diego during the month of September, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $218.

Question 3

Which layover airport offers the lowest fares from Seattle to San Diego?

Accepted Answer

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $197.

Question 4

How many flights depart from Seattle to San Diego on average per day?

Accepted Answer

As of February 2026, 33 flights take off from Seattle and land in San Diego each day. The most common flight departure time for this route is 6:00PM, with 37% of daily flights taking off in the afternoon.

Question 5

What is the most punctual flight time for Seattle to San Diego flights?

Accepted Answer

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Question 6

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Question 7

How many flights depart from Seattle to San Diego on average per week?

Accepted Answer

The number of flights available between Seattle and San Diego is 235 per week as of February 2026. The most frequent departure day is Mon, with 23% of weekly flights leaving on this day.

Question 8

Which airport is the most popular layover for flights between Seattle and San Diego?

Accepted Answer

Las Vegas (LAS) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Question 9

What is the cheapest day to depart on your flight to San Diego?

Accepted Answer

The cheapest day to depart from Seattle to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $257. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $307. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

Question 10

What is the cheapest time of day to depart on your flight to San Diego?

Accepted Answer

The cheapest time of day to fly to San Diego is in the morning when flights can be purchased for as low as $272. Flights in the afternoon are often more expensive with an average ticket price of $294.

Question 11

What is the cheapest Seattle/Tacoma Intl to San Diego flight route?

Accepted Answer

Fly from Seattle/Tacoma Intl to San Diego for the best Seattle/Tacoma Intl - San Diego flight prices

Question 12

How have Seattle to San Diego flight prices changed over time?

Accepted Answer

As of February 2026, prices for Seattle to San Diego flights are approximately 18% more expensive when compared to flights at the same time last year.

Question 13

What is the cheapest airline that flies from Seattle/Tacoma Intl to San Diego?

Accepted Answer

Frontier and Southwest are the most popular carriers operating from Seattle/Tacoma Intl to San Diego

Question 14

Which airline has the best punctuality record on Seattle to San Diego flights?

Accepted Answer

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

Question 15

Which layover airport has the shortest travel time from Seattle to San Diego?

Accepted Answer

Flights connecting via Las Vegas (LAS) have the shortest average one-way travel time: 8h 27m.

Question 16

How far in advance should I book a flight to San Diego?

Accepted Answer

You are more likely to see cheaper flights to San Diego from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $265 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Seattle for as low as $225 on momondo.

Question 17

Which layover airport has the shortest connection time from Seattle to San Diego?

Accepted Answer

Las Vegas (LAS) has the shortest average layover time for this route: 6h 34m.

Question 18

What cabin class options are available on Seattle/Tacoma Intl to San Diego flights?

Accepted Answer

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 19

How often are flights from Seattle to San Diego delayed?

Accepted Answer

Historically, on average around 16% of flights between Seattle and San Diego have experienced a delay on any given week. The average delay length over the past 12 months has been 124 minutes.

Question 20

Can stopping save me money on Seattle to San Diego flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between Seattle to San Diego.

Question 21

Which airlines fly direct from Seattle to San Diego?

Accepted Answer

Alaska Airlines and Delta Airlines provide direct flights from Seattle Tacoma International Airport (SEA) to San Diego Airport (SAN). However, you can get on one-stop or two-stop flights by various airlines. United Airlines offer one-stop flights on the route with layovers in San Francisco (SFO). American Airlines provide one-stop flights with layovers in Phoenix (PHX) or Dallas (DFW). Spirit Airlines offer one-stop flights to San Diego with a layover in Las Vegas (LAS).

What is the best way to get in and out of airports in Seattle and San Diego?

Several options offer transfers to and from Seattle and San Diego. The best option depends on your preference and travel needs. If you are on solo travel and have less luggage, public transport is the best option. If coming from Downtown Seattle or any other part of the city, you can take the Link light rail, which departs every ten minutes. Sound Transit and King County Metro offer bus services to and from the airport. You can find the buses near the light rail station on International Boulevard. Public transport options are also cheaper and more reliable ways to get to the airport. If you have a late-night flight or prefer private transfers, you can opt for a taxi or Ride-share app. Alternatively, you can drive your car to the airport. Seattle-Tacoma International Airport (SEA) offers long-term and short-term parking options. Private transfers are comfortable and faster but pricier than private transfers. San Diego is served by San Diego International Airport (SAN). Bus line 992 by MTS offers bus rides to the city center. You can take them in front of terminals 1 and 2. Buses run every 25 minutes and operate between 5 am and 11 pm. You can also take the light rail with the green, blue, or orange line. You can also catch a taxi from Transportation Plaza in SAN. Alternatively, you can rent a vehicle and drive to your destination.

What are the benefits of the different airports in Seattle and San Diego

Seattle has two airports: Seattle-Tacoma International Airport (SEA) and King County International Airport (KCIA). SEA is the only airport that provides passenger flights. SEA provides numerous flights to different destinations regularly. In addition, SEA  lies near Seattle, offering numerous transfer options. The airport also features several passenger facilities, including ATMs, retail stores, and dining options. At BFI, only two airlines serve passengers, namely Kenmore Air and JSX. In San Diego, the main airport to land in is San Diego International Airport (SAN). The airport lies three miles from San Diego and operates 50 flights daily. It is the busiest airport in the area, with various services, dining, and retail options. The airport offers numerous flight options for domestic and international journeys.

Which cities can you get to from San Diego Airport?

You can travel to different cities from San Diego Airport (SAN). A two-hour drive can get you from SAN to Palm Springs. Trains and buses take longer, about six hours. Bus lines 2037 and F2056 can get you to Palm Springs. It boasts Chino Canyon, one of the steepest desert canyons in the country. It also features Morten Botanical Gardens, India Canyons, and several museums. From SAN, you can also get to Laguna Beach, a nearby city. You can drive car rentals from SAN or opt for public transport. You can take a bus from the airport's Terminal 1 to Old Town Transit Center. From here, the average train ride to San Juan Capistrano Amtrak Station, near Laguna Beach. A town car or taxi can get you to the city in less than an hour and a half. The city is popular for its boutiques and pristine beaches.

Question 22

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to San Diego Airport?

Accepted Answer

Prices for flights from Seattle/Tacoma Intl Airport to San Diego Airport are updated daily.

Question 23

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to San Diego Airport?

Accepted Answer

The number of operators available for flights from Seattle/Tacoma Intl Airport to San Diego Airport is 7 as of February 2026.

Question 24

How old do you have to be to fly from Seattle/Tacoma Intl Airport to San Diego Airport?

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to San Diego Airport.

Question 25

What documentation or ID do you need to fly to San Diego Airport?

Accepted Answer

The travel and health documents you'll need for your trip to San Diego Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Diego Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best Price Found	$100
Fastest flight time	2h 35m
Direct flights	Every day
Airports in San Diego	1 airport

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $69	Free Cancellation	Rating 6.3 8,398 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $88	Free Cancellation	Rating 5.7 3,051 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $104	Free Cancellation	Rating 7.8 2,830 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $119	Free Cancellation	Rating 7.9 8,135 reviews	Search Delta flights
Alaska Airlines	PriceFrom $138	Free Cancellation	Rating 8.0 11,831 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $155	Free Cancellation	Rating 8.0 4,272 reviews	Search Southwest flights
American Airlines	PriceFrom $246	Free Cancellation	Rating 7.2 11,212 reviews	Search American Airlines flights

Cheap flights from Seattle to San Diego from $78

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