Question 1

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

Accepted Answer

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $163.

Question 2

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

Accepted Answer

As of December 2025, prices for San Diego to Seattle flights are approximately 20% more expensive when compared to flights at the same time last year.

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

Denver (DEN) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Question 5

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

Accepted Answer

Flights connecting via Los Angeles (LAX) have the shortest average one-way travel time: 5h 08m.

Question 6

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

Accepted Answer

247 flights are operational weekly from San Diego to Seattle as of December 2025. The most popular departure day for this route is Wed, with 20% of flights per week taking off on this day.

Question 7

What is the cheapest day to depart on your flight to Seattle?

Accepted Answer

On average, the least expensive day to fly to Seattle from San Diego is on a Thursday. momondo users have found tickets for Thursday departures for as low as $334. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from San Diego because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $554.

Question 8

How often are flights from San Diego to Seattle delayed?

Accepted Answer

Historically, on average around 12% of flights between San Diego and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 147 minutes.

Question 9

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. Friday has historically seen more delays on average compared to the rest of the week.

Question 10

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

Accepted Answer

United Airlines, Frontier, and Alaska Airlines are the most popular carriers operating from San Diego to Seattle/Tacoma Intl

Question 11

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

Accepted Answer

Flying to Seattle from San Diego in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $342 when looking at flights departing in the afternoon. Flights to Seattle are more costly at noon, with an average ticket price of $415. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 12

What airlines fly to Seattle?

Accepted Answer

Alaska Airlines, Delta and Frontier are the top three most popular airlines that fly to Seattle from San Diego according to our data. Alaska Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

How far in advance should I book a flight to Seattle?

Accepted Answer

You are more likely to see cheaper flights to Seattle from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $248 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from San Diego for as low as $205 on momondo.

Question 16

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

Accepted Answer

Sacramento (SMF) has the shortest average layover time for this route: 1h 25m.

Question 17

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, January is the cheapest month to fly from San Diego to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $186. If you don’t want to visit Seattle in January, then you should wait until February to fly from San Diego, when ticket prices are also cheap, with an average price of $207.

Question 18

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

Accepted Answer

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

Question 19

Which airline has the best punctuality record on San Diego to Seattle 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 9% of their flights experiencing any sort of delay.

Question 20

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

Accepted Answer

As of December 2025, 35 flights take off from San Diego and land in Seattle each day. The most common flight departure time for this route is 11:00AM, with 53% of daily flights taking off at noon.

Question 21

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

Accepted Answer

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

Question 22

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

Accepted Answer

There are 8 operators available for flights from San Diego Airport to Seattle/Tacoma Intl Airport as of December 2025.

Question 23

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

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Diego Airport to Seattle/Tacoma Intl Airport.

Question 24

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

Accepted Answer

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best Price Found	$186
Fastest flight time	3h 04m
Direct flights	Every day
Airports in Seattle	1 airport

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $64	Free Cancellation	Rating 6.3 8,174 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $103	Free Cancellation	Rating 5.8 3,084 reviews	Search Frontier flights
Delta	PriceFrom $137	Free Cancellation	Rating 7.9 8,009 reviews	Search Delta flights
Alaska Airlines	PriceFrom $147	Free Cancellation	Rating 8.0 11,429 reviews	Search Alaska Airlines flights
Hawaiian Airlines	PriceFrom $159	Free Cancellation	Rating 7.8 2,818 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $166	Free Cancellation	Rating 7.9 4,252 reviews	Search Southwest flights
United Airlines	PriceFrom $216	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights

Cheap flights from San Diego to Seattle from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to Seattle departing on 1/5. 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 San Diego to Seattle

What is the cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

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

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

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

How far in advance should I book a flight to Seattle?

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

There are 4 cabin classes available to choose from on San Diego to Seattle/Tacoma Intl 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 San Diego to Seattle flights?

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

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

As of December 2025, prices for San Diego to Seattle flights are approximately 20% more expensive when compared to flights at the same time last year.

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

United Airlines, Frontier, and Alaska Airlines are the most popular carriers operating from San Diego to Seattle/Tacoma Intl

What airlines fly to Seattle?

How often are flights from San Diego to Seattle delayed?

Historically, on average around 12% of flights between San Diego and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 147 minutes.

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

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

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

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

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

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

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

Denver (DEN) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $163.

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

Flights connecting via Los Angeles (LAX) have the shortest average one-way travel time: 5h 08m.

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

Sacramento (SMF) has the shortest average layover time for this route: 1h 25m.

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

As of December 2025, 35 flights take off from San Diego and land in Seattle each day. The most common flight departure time for this route is 11:00AM, with 53% of daily flights taking off at noon.

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

247 flights are operational weekly from San Diego to Seattle as of December 2025. The most popular departure day for this route is Wed, with 20% of flights per week taking off on this day.

When to book flights from San Diego to Seattle

Cheap San Diego to Seattle (SAN to SEA) flight deals and tips

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

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

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

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

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

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