Cheap flights from Seattle to San Diego from $55
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to San Diego departing on 7/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Seattle to San Diego
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to San Diego?
If you are unable to visit San Diego during the month of January, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $187.
What is the cheapest day to depart on your flight to San Diego?
The cheapest day to depart from Seattle to San Diego is on a Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $245. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $312. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.
What is the cheapest time of day to depart on your flight to San Diego?
The cheapest time of day to fly to San Diego is in the evening when flights can be purchased for as low as $260. Flights at noon are often more expensive with an average ticket price of $346.
What is the cheapest Seattle/Tacoma Intl to San Diego flight route?
Fly from Seattle/Tacoma Intl to San Diego for the best Seattle/Tacoma Intl - San Diego flight prices
How far in advance should I book a flight to San Diego?
You are more likely to see cheaper flights to San Diego from Seattle when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $258 when searching 17 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 $208 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to San Diego flights?
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.
What is the cheapest airline that flies from Seattle/Tacoma Intl to San Diego?
Spirit Airlines, Delta, and Southwest are the most popular carriers operating from Seattle/Tacoma Intl to San Diego
What airlines fly to San Diego?
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 51% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 9 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to San Diego on average per day?
As of June 2025, 42 flights take off from Seattle and land in San Diego each day. The most common flight departure time for this route is 7:00PM, with 35% of daily flights taking off in the evening.
How many flights depart from Seattle to San Diego on average per week?
The number of flights available between Seattle and San Diego is 298 per week as of June 2025. The most frequent departure day is Thu, with 21% of weekly flights leaving on this day.
When to book flights from Seattle to San Diego
Cheap Seattle to San Diego (SEA to SAN) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to San Diego
How far is Seattle/Tacoma Intl to San Diego by plane?
The distance between Seattle/Tacoma Intl and San Diego is about 1063.7 mi. In terms of flight time, this usually takes a little over 2h 52m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to San Diego Airport?
Prices for flights from Seattle/Tacoma Intl Airport to San Diego Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to San Diego Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to San Diego Airport is 9 as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to San Diego Airport?
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.
What documentation or ID do you need to fly to San Diego Airport?
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.
What is the most popular plane model from Seattle to San Diego?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to San Diego is Boeing 737-800 Passenger/BBJ2 (winglets) (25.66% of total bookings). The next most popular plane models are Boeing 737-900 Passenger/BBJ3 (winglets) (24.61%), Boeing 737 MAX 9 (17.83%), and Boeing 737 (15.58%).
What is the most popular airline from Seattle to San Diego?
momondo data reveals that the most frequently booked airline on the route from Seattle to San Diego is Delta, representing 49% of all bookings. The subsequent popular airlines are Alaska Airlines at 42%, Frontier at 3%, and Spirit Airlines at 3%.
Best airlines flying from Seattle to San Diego
Compare and see reviews for airlines that fly from Seattle to San Diego with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $79 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $101 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $117 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $131 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $142 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $173 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $176 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $194 | Free Cancellation | Rating 8.0 4,287 reviews |
Delta Flights From Seattle to San Diego
Delta operates around 29 flights from Seattle to San Diego every week. The average price of these flights found in the last 72 hours has been $246, but momondo users have found Delta deals from Seattle to San Diego from as low as $117 round-trip. Delta has been scored 8.0/10 in 7,950 reviews.
Alaska Airlines Flights From Seattle to San Diego
$142 is the best Alaska Airlines flight deal from Seattle to San Diego found on momondo over the last 72 hours. The average Alaska Airlines ticket price found was closer to $305, however, with flight time and availability significantly affecting the price. Alaska Airlines (8.0/10 from 10,000 user reviews) flies into San Diego from Seattle 12 times in an average week so prices can vary.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to San Diego?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to San Diego. momondo saves you time and could save you money on your trip.
Can I find flights from Seattle to San Diego with flexible booking policies on momondo?
Flights from Seattle to San Diego with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Seattle to San Diego?
Once you have performed a search for Seattle to San Diego flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Seattle to San Diego right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seattle to San Diego flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.