Cheap flights from Seattle to San Diego from C$ 125
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 2/8. 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?
In general, January is the cheapest month to fly from Seattle to San Diego. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 254. 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 C$ 254.
What is the cheapest day to depart on your flight to San Diego?
The cheapest day to depart on your flight to San Diego is on a Wednesday when prices can be found for as low as C$ 253. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to San Diego on Saturday is C$ 438.
What is the cheapest time of day to depart on your flight to San Diego?
Flying to San Diego from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as C$ 287 when looking at flights departing in the afternoon. Flights to San Diego are more costly at noon, with an average ticket price of C$ 388. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
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 15 weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around C$ 350 when searching 15 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 C$ 287 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to San Diego flights?
There are 3 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.
Can stopping save me money on Seattle to San Diego flights?
You could potentially save up to 62% on your flight if you consider stops on a Seattle to San Diego flight.
How have Seattle to San Diego flight prices changed over time?
As of June 2025, prices for Seattle to San Diego flights are approximately 2% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Seattle/Tacoma Intl to San Diego?
Spirit Airlines, Southwest, and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to San Diego
Which 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 62% of people opting to fly with this airline when travelling to San Diego. Keep in mind that there are 5 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?
51 flights are operational daily from Seattle to San Diego as of June 2025. The most popular departure time for this route is 7:00p.m., with 35% of flights per day taking off in the afternoon.
How many flights depart from Seattle to San Diego on average per week?
As of June 2025, there are 362 flights per week flying from Seattle to San Diego. The most common day of the week flights depart is Tue, with 17% of flights taking off 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
Best price found | C$ 125 |
|---|---|
Fastest flight time | 2h 45m |
Direct flights | Every day |
Airports in San Diego | 1 airport |
How far is Seattle/Tacoma Intl to San Diego by plane?
A flight from Seattle/Tacoma Intl to San Diego will travel around 1711.9 km. Typically, this will take 2h 45m by plane in normal conditions.
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?
There are 4 operators available for flights from Seattle/Tacoma Intl Airport to San Diego Airport as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to San Diego Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 flights between Seattle and San Diego, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 25.89% of the total bookings. Other popular models include Boeing 737-900 Passenger/BBJ3 (winglets) with 23.65%, Boeing 737 MAX 9 with 17.79%, and Boeing 737 with 15.74%.
What is the most popular airline from Seattle to San Diego?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to San Diego is Alaska Airlines (60% of total bookings). The next most popular airlines are Delta (27%), Spirit Airlines (7%), and Frontier (6%).
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 C$ 132 | Free Cancellation | Rating 8.0 7,965 reviews | |||
| PriceFrom C$ 136 | Free Cancellation | Rating 5.9 3,301 reviews | |||
| PriceFrom C$ 150 | Free Cancellation | Rating 6.3 8,065 reviews | |||
| PriceFrom C$ 173 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Seattle to San Diego
Across 28 Delta flights from Seattle to San Diego this week, the average price was C$ 214, with the best Delta deals starting from C$ 97 round-trip. 7,964 users have rated Delta on momondo, with an average score of 8.0/10.
Alaska Airlines Flights From Seattle to San Diego
Across 10,000 Alaska Airlines reviews on momondo, the average score is 8.0/10. Alaska Airlines flies from Seattle to San Diego about 53 times each week, with ticket deals ranging from C$ 127 to C$ 237. Price data is based on momondo searches in the last 72 hours.
Travelling 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?
Finding the right flight to San Diego from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Diego quick and easy, saving you time and money.
Can I find flights from Seattle to San Diego with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to San Diego from Seattle with this policy.
How can momondo help me find flights from Seattle to San Diego?
momondo helps you find the best flight between Seattle and San Diego by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to San Diego right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Seattle to San Diego now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Diego and let you know when they change.