To San Diego

Cheap Flights from Seattle to San Diego

Browse current best options from Seattle. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

Seattle

RatePunk searches hundreds of travel sites at once for deals on flights to San Diego

Prices updated 24 days ago

486,190 searches this week

171 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)

Today’s best flight deals from Seattle to San Diego

Explore current cheapest deals departing from Seattle to San Diego

Round trip

Sort by: Cheapest

September 18 - September 22

Cheapest

SEA - San Diego

$157

$140

Round trip

October 28 - October 31

Cheapest

SEA - San Diego

$225

$140

Round trip

September 12 - September 14

SEA - San Diego

$154

$143

Round trip

September 17 - September 21

SEA - San Diego

$155

$143

Round trip

October 24 - October 29

SEA - San Diego

$223

$143

Round trip

November 14 - November 16

Best

PAE - San Diego

$238

$143

Round trip

September 15 - September 22

PAE - San Diego

$217

$152

Round trip

October 14 - October 20

SEA - San Diego

$213

$157

Round trip

July 14 - July 21

Earliest

SEA - San Diego

$165

$158

Round trip

August 11 - August 18

SEA - San Diego

$195

$158

Round trip

Unlock all 500+ flight deals to San Diego and get alerts when great deals appear

Route Intelligence — 486,190 Searches this Week

Insights for flights from Seattle to San Diego

For cheap flights from Seattle to San Diego, prices typically range from $216–$472, with a median of $294. Right now, fares are near the typical level, and about 16% of recent fares are considered a good price. New deals appear almost daily, suggesting frequent opportunities to find favorable prices.

When is the cheapest time to fly from Seattle to San Diego? You'll find the lowest median fares in January, at $196. Other affordable months include May, with a median fare of $217, and September, where the median price is $247.

Most itineraries for this route connect at least once, with only 36.9% of recent fares being direct flights from Seattle to San Diego. For connecting itineraries, the typical number of stopovers is 1.

A typical journey from Seattle to San Diego takes about 7h 17m, including connections. This duration reflects the overall travel time, accounting for any layovers on connecting flights.

The distance between Seattle and San Diego is 1692 km, classifying this as a medium-haul route. This distance typically involves a flight duration that is longer than short-haul but shorter than long-haul international travel.

How much is a round trip from Seattle to San Diego

Regular price: $121 - $255

Prices are currently within the regular range.

The regular price range for flights from Seattle to San Diego is between $121 and $255. The current lowest deal is $140 with Alaska Airlines, Inc. for travel from Sep 18-Sep 22.

now $140

Low $121

High $255

The cheapest time to fly from Seattle to San Diego

The cheapest month to fly from Seattle to San Diego is January, with a median price of $196. The most expensive month is April, with a median price of $570. Prices are generally lower from January to October.

January

Cheapest

Flights from $196

April

Most Expensive

Flights from $570

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Seattle to San Diego

Alaska Airlines, Inc.

Last-minute flights going from Seattle to San Diego

Wed, Jul 1

⌛ Last-Minute

PAE - San Diego

Everett (PAE) - San Diego (SAN)

Alaska Airlines, Inc.

$310

$201

One-way

Wed, Jul 1

⌛ Last-Minute

PAE - San Diego

Everett (PAE) - San Diego (SAN)

Alaska Airlines, Inc.

$368

$267

One-way

Thu, Jul 2

⌛ Last-Minute

PAE - San Diego

Everett (PAE) - San Diego (SAN)

Alaska Airlines, Inc.

$337

$232

One-way

Fri, Jul 3

⌛ Last-Minute

PAE - San Diego

Everett (PAE) - San Diego (SAN)

Alaska Airlines, Inc.

$353

$215

One-way

Fri, Jul 3

⌛ Last-Minute

PAE - San Diego

Everett (PAE) - San Diego (SAN)

Alaska Airlines, Inc.

$352

$254

One-way

Sat, Jul 4

⌛ Last-Minute

SEA - San Diego

Seattle (SEA) - San Diego (SAN)

United Airlines

$269

$189

One-way

Biggest price drops on these dates for flights from Seattle to San Diego

3 nights

Dec 8 - Dec 11

$529 → $257

51%

4 nights

Dec 10 - Dec 14

$410 → $189

54%

7 nights

Dec 5 - Dec 12

$404 → $189

53%

6 nights

Dec 2 - Dec 8

$375 → $167

55%

Popular Airports to fly from Seattle to San Diego

Seattle - San Diego route insights

💸 Price insights

Recent fares are near the typical level

Recent fares from Seattle to San Diego are near the typical level, with 16% good prices.

📅 Best time to fly

January is historically cheapest at $196

Historically, January is the cheapest month to fly from Seattle to San Diego, with a median price of $196.

⏱️ Flight duration

Median flight time is 7h 17m

The median flight time from Seattle to San Diego is 7 hours 17 minutes, including layovers.

✈️ Airlines & availability

Connecting flights are more common

Connecting flights make up 36.9% of deals, with a median of 1 stopover when connecting.

🏆 Airline highlight

Alaska Airlines, Inc. offers direct flights

Alaska Airlines, Inc. is one airline that historically offers direct flights on this route.

🎯 Booking tip

Deals appear frequently for this route

Historically, deals for flights from Seattle to San Diego appear frequently, with over 1 deal per day.

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International Airport is a good option for flights from Seattle to San Diego.

📍 ~18 km from city center (reachable by car or public transport)

💸 Flights from ~$140

Boeing Field (BFI)

Boeing Field offers an alternative departure point for your journey to San Diego.

📍 ~8 km from city center (reachable by car)

💸 Flights from ~$658

Kenmore Air Harbor Seaplane Base (LKE)

Kenmore Air Harbor Seaplane Base provides another departure choice for flights to San Diego.

📍 ~3 km from city center (reachable by car)

💸 Flights from ~$651

San Diego main airports to arrive at

San Diego International (SAN)

Cheapest

San Diego International Airport is a convenient arrival option for flights from Seattle to San Diego.

📍 ~5 km from San Diego city center (reachable by car)

💸 Flights from ~$140

McClellan–Palomar (CLD)

McClellan–Palomar Airport offers an alternative arrival point for travelers flying from Seattle to San Diego.

📍 ~45 km from San Diego city center (reachable by car)

💸 Flights from ~$313

Airports nearby San Diego used as alternative

Tijuana International (TIJ)

Tijuana International is an excellent alternative for Mexico-bound flights, with direct access via CBX.

📍 ~20 km from San Diego (reachable by car)

💸 Flights from ~$425

John Wayne (SNA)

John Wayne is a close major US domestic alternative, often less congested than LAX.

📍 ~125 km from San Diego (reachable by car)

💸 Flights from ~$204

Los Angeles International (LAX)

Cheapest

Los Angeles International offers the most extensive international and domestic route options.

📍 ~180 km from San Diego (reachable by car)

💸 Flights from ~$117

Ontario International (ONT)

Ontario International is a reliable domestic alternative with growing service, often less congested.

📍 ~180 km from San Diego (reachable by car)

💸 Flights from ~$171

Long Beach (LGB)

Long Beach is easy to navigate with fast security, good for specific West Coast routes.

📍 ~155 km from San Diego (reachable by car)

💸 Flights from ~$166

Business & First Class Flight Deals to San Diego

43% AI deal score

$1,257

Frequently Asked Questions About Flights to San Diego

Historically, the best time to book flights from Seattle to San Diego is typically 60+ days before departure. Across the trailing quarter, flights booked in this window had an average price of $346. In contrast, flights booked 0-6 days before departure averaged $816, demonstrating a significant price difference. Booking within the 14-27 day window also offered a relatively good average price of $348.

Based on data from the trailing 90 days, a good price for a flight from Seattle to San Diego is considered to be $216 or less. The median price for this route was $294. Prices typically rise significantly, with 75% of observed prices being $472 or less.

Historically, the cheapest months to fly from Seattle to San Diego are January, with a median price of $196, and May, with a median price of $217. September also offered a relatively low median price of $247. The annual median price for this route was $294, indicating that these months offer notable savings compared to the yearly average.

Related routes

Consider alternative routes from Seattle

Flights from Seattle to Addis Ababa Flights from Seattle to Adelaide Flights from Seattle to Ahmedabad Flights from Seattle to Albany Flights from Seattle to Albuquerque Flights from Seattle to Amsterdam Flights from Seattle to Anchorage Flights from Seattle to Asmara Flights from Seattle to Athens Flights from Seattle to Atlanta Flights from Seattle to Auckland Flights from Seattle to Austin