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Cheap flights from Seattle to San Diego from C$ 108

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Alaska Airlines flights from Seattle to San Diego

Our best Alaska Airlines deals on Seattle to San Diego flight tickets
Alaska Airlines
20 Sep
SEA9:53 a.m.Seattle/Tacoma Intl
3h 03m
SAN12:56 p.m.San Diego
1 Oct
SAN8:15 a.m.San Diego
3h 10m
SEA11:25 a.m.Seattle/Tacoma Intl
C$ 217
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Alaska Airlines
30 Sep
SEA9:59 a.m.Seattle/Tacoma Intl
4h 27m
1 stop
SAN2:26 p.m.San Diego
30 Sep
SAN4:06 p.m.San Diego
6h 21m
1 stop
SEA10:27 p.m.Seattle/Tacoma Intl
C$ 236
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Alaska Airlines
20 Sep
SEA5:20 a.m.Seattle/Tacoma Intl
4h 39m
1 stop
SAN9:59 a.m.San Diego
30 Sep
SAN10:33 a.m.San Diego
4h 22m
1 stop
SEA2:55 p.m.Seattle/Tacoma Intl
C$ 243
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Delta flights from Seattle to San Diego

Our best Delta deals on Seattle to San Diego flight tickets
Delta
20 Sep
SEA10:00 a.m.Seattle/Tacoma Intl
2h 57m
SAN12:57 p.m.San Diego
1 Oct
SAN3:35 p.m.San Diego
2h 57m
SEA6:32 p.m.Seattle/Tacoma Intl
C$ 217
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Delta
18 Sep
SEA7:10 a.m.Seattle/Tacoma Intl
2h 48m
SAN9:58 a.m.San Diego
27 Sep
SAN1:55 p.m.San Diego
3h 00m
SEA4:55 p.m.Seattle/Tacoma Intl
C$ 259
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Delta
18 Sep
SEA3:25 p.m.Seattle/Tacoma Intl
2h 46m
SAN6:11 p.m.San Diego
25 Sep
SAN7:29 a.m.San Diego
3h 06m
SEA10:35 a.m.Seattle/Tacoma Intl
C$ 272
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See travel insights to San Diego from

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, September 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$ 259. 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 C$ 261.

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 Tuesday when prices can be found for as low as C$ 272. 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$ 463.

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$ 292 when looking at flights departing in the afternoon. Flights to San Diego are more costly at noon, with an average ticket price of C$ 507. 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 weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around C$ 358 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 C$ 299 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 60% 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 August 2025, prices for Seattle to San Diego flights are approximately 17% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

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$ 122

Fastest flight time

2h 46m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from Seattle in the past 72 hours is C$ 122. The best round-trip flight deal from Seattle to San Diego found on momondo in the last 72 hours is C$ 217.
The fastest flight from Seattle to San Diego takes 2h 46m
Direct flights go from Seattle to San Diego every day.
There is 1 airport near San Diego: San Diego (SAN)
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  • 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 46m 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?

  • 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?

  • What is the most popular airline from Seattle to San Diego?

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
DeltaPriceFrom C$ 134Free CancellationRating
8.0
7,985 reviews
Search Delta flights
FrontierPriceFrom C$ 138Free CancellationRating
5.8
3,237 reviews
Search Frontier flights
Spirit AirlinesPriceFrom C$ 153Free CancellationRating
6.3
8,058 reviews
Search Spirit Airlines flights
Alaska AirlinesPriceFrom C$ 173Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Delta Flights From Seattle to San Diego

    Across 20 Delta flights from Seattle to San Diego this week, the average price was C$ 219, with the best Delta deals starting from C$ 97 round-trip. 7,985 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 48 times each week, with ticket deals ranging from C$ 125 to C$ 232. 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 locations
Coronado
Chula Vista
El Cajon

Why 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.

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