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$130+ Cheap flights from Reagan-National (DCA) to San Diego (SAN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SAN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to San Diego are usually found in February or January, booked 75 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap flight deals from Reagan-National to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$231
(Trip.com)

One-way from

$130
(Southwest)

Popular in

December

Cheapest in

February

Average price

$367

Good round-trip deal

$297 or less

Good one-way deal

$158 or less
From Washington, D.C. Reagan-National to San Diego
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One-way flight from Washington, D.C. Reagan-National to San Diego
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Highest demand for flights based on searches. 6% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. Reagan-National to San Diego.
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Price to beat on a one-way flight from Washington, D.C. Reagan-National to San Diego.
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Find flight deals from Reagan-National to San Diego

Cheapest flights from Reagan-National to San Diego
Explore the most affordable flight options available from Reagan-National to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Trip.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:59 amDCA - SAN
Nonstop5h 21mAlaska Airlines
Sat 9/131:41 pmSAN - DCA
Nonstop5h 18mAlaska Airlines
Deal found 8/12$231
This Gotogate deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/66:00 pmDCA - SAN
1 stop7h 24mFrontier
Sat 9/137:15 amSAN - DCA
1 stop11h 44mFrontier
Deal found 8/12$232
This Expedia deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/66:00 pmDCA - SAN
1 stop7h 24mMultiple Airlines
Tue 9/91:41 pmSAN - DCA
Nonstop5h 18mMultiple Airlines
Deal found 8/14$233
This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/279:59 amDCA - SAN
Nonstop5h 21mHawaiian Airlines
Sat 10/412:12 pmSAN - DCA
Nonstop5h 17mHawaiian Airlines
Deal found 8/13$234
This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:00 pmDCA - SAN
1 stop8h 50mFrontier
Sun 10/194:14 pmSAN - DCA
2 stops16h 50mFrontier
Deal found 8/14$235
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:59 amDCA - SAN
Nonstop5h 21mHawaiian Airlines
Sat 9/131:41 pmSAN - DCA
Nonstop5h 18mHawaiian Airlines
Deal found 8/12$236
This Alaska Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:59 amDCA - SAN
Nonstop5h 21mAlaska Airlines
Tue 9/161:41 pmSAN - DCA
Nonstop5h 18mAlaska Airlines
Deal found 8/14$237
This Trip.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:59 amDCA - SAN
Nonstop5h 21mHawaiian Airlines
Wed 9/246:15 amSAN - DCA
1 stop8h 44mHawaiian Airlines
Deal found 8/14$239
This Booking.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:00 amDCA - SAN
1 stop18h 24mFrontier
Wed 9/247:15 amSAN - DCA
1 stop25h 55mFrontier
Deal found 8/12$240
This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:00 amDCA - SAN
2 stops9h 26mFrontier
Sat 10/187:00 amSAN - DCA
1 stop11h 59mFrontier
Deal found 8/14$241
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/34:55 pmDCA - SAN
1 stop7h 05mSouthwest
Sat 9/610:50 amSAN - DCA
1 stop7h 05mSouthwest
Deal found 8/12$242

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to San Diego that are best for you.

Fly from

Reagan-National

Fly to

San Diego

Route

Depart

Return

Price

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Fri 10/31

1:00 pm-11:50 pm

1 stop13h 50m

San Diego

Mon 11/3

7:36 am-9:59 pm

2 stops11h 23m

$231

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Sat 9/6

9:59 am-12:20 pm

Nonstop5h 21m

San Diego

Sat 9/13

1:41 pm-9:59 pm

Nonstop5h 18m

$231

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Wed 11/5

11:35 am-4:15 pm

1 stop7h 40m

San Diego

Wed 11/12

7:10 am-6:20 pm

2 stops8h 10m

$232

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Sat 9/6

6:00 pm-10:24 pm

1 stop7h 24m

San Diego

Sat 9/13

7:15 am-9:59 pm

1 stop11h 44m

$232

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Sat 9/6

7:00 am-10:24 pm

1 stop18h 24m

San Diego

Tue 9/9

7:15 am-9:59 pm

1 stop11h 44m

$232

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Tue 9/23

6:00 pm-10:24 pm

1 stop7h 24m

San Diego

Tue 9/30

7:15 am-9:59 pm

1 stop11h 44m

$232

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Sat 9/6

6:00 pm-10:24 pm

1 stop7h 24m

San Diego

Tue 9/9

1:41 pm-9:59 pm

Nonstop5h 18m

$233

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Fri 11/7

6:00 pm-11:50 pm

1 stop8h 50m

San Diego

Wed 11/12

1:00 pm-9:05 pm

Nonstop5h 05m

$233

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Wed 9/10

9:59 am-12:20 pm

Nonstop5h 21m

San Diego

Mon 9/15

10:20 am-9:59 pm

1 stop8h 39m

$233

Washington, D.C.San Diego

DCA - SAN

DCASAN

Washington, D.C. Reagan-National

Tue 9/16

6:00 pm-10:24 pm

1 stop7h 24m

San Diego

Sat 9/20

7:15 am-9:59 pm

1 stop11h 44m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 22 results
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Best time to book a flight from Reagan-National to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Reagan-National with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to San Diego

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Reagan-National to San Diego. Price data was last updated on August 8, 2025.

The best time to book flights from Washington, D.C. Reagan-National Airport to San Diego is 17 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to San Diego?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to San Diego (average of $286). Flying from Washington, D.C. Reagan-National Airport to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DCA to SAN?

Find hourly flight availability from Reagan-National to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Reagan-National Airport to San Diego in the afternoon. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to San Diego. Price data was last updated on August 10, 2025.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to San Diego flight should consider departing on Monday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. Reagan-National Airport to San Diego

Explore weekly flight availability from Reagan-National to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 14, 2025.

The most flights from DCA to SAN are scheduled on a Thursday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

What’s the top layover airport for flights from Washington, D.C. Reagan-National Airport to San Diego?

Share of 1-stop round-trip flights from Washington, D.C. Reagan-National Airport to San Diego chosen by Cheapflights users in the past 12 months, using the same layover each way.

Denver (DEN) – chosen by Cheapflights users on 82% of 1-stop itineraries from Washington, D.C. Reagan-National Airport to San Diego on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. Reagan-National Airport to San Diego?

Average round-trip fare for 1-stop flights from Washington, D.C. Reagan-National Airport to San Diego, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $177.

What’s the fastest layover option from Washington, D.C. Reagan-National Airport to San Diego?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. Reagan-National Airport to San Diego, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 7h 48m.

Which airport typically offers the quickest layover for flights from Washington, D.C. Reagan-National Airport to San Diego?

Average layover duration for 1-stop one-way flights from Washington, D.C. Reagan-National Airport to San Diego, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 0h 58m.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated August 14, 2025.
See what other customers who have flown with Alaska Airlines, Hawaiian Airlines, and United Airlines from Washington, D.C. Reagan-National Airport to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Hawaiian Airlines
7.8
Good
2,656 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
United Airlines
7.4
Good
8,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Frontier
5.8
Fair
3,219 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Diego from Washington, D.C. Reagan-National?

    If you book a flight to San Diego from Washington, D.C. Reagan-National, you will be flying to San Diego, which is the city’s only airport. San Diego (SAN) is located 2.6 mi from the center of San Diego. There are 3 flights from Washington, D.C. Reagan-National to San Diego per day from 7 different airlines.

  • What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to San Diego round-trip?

    Currently priced at $145, Frontier will fly you from Washington, D.C. Reagan-National Airport to San Diego and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Hawaiian Airlines - these airlines can fly you to your destination from $222 and $237, respectively. Frontier is currently priced 60% below the average price you’ll pay for this route.

  • What are the cheapest flights from Washington, D.C. Reagan-National Airport to San Diego?

    On average you can expect to pay $770 for a flight from Washington, D.C. Reagan-National Airport to San Diego. The cheapest flight overall is $110 while the most popular route, (Washington, D.C. Reagan-National - San Diego) is currently priced at $208.

  • Can I find deals for flights from Reagan-National to San Diego that include hotel bookings?

    Yes. In addition to deals on Reagan-National to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to San Diego.

  • Can I find deals for business class flights from Reagan-National to San Diego?

    Yes. Cheapflights offers flight deals from Reagan-National to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to San Diego (average of $286). Flying from Washington, D.C. Reagan-National Airport to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
National City
Lemon Grove
Imperial Beach
Alpine

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Alternative routes for Reagan-National to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Reagan-National to San Diego

Discover the top 7 airlines that operate flights from Reagan-National to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$145Average$262FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$222Average$484FlexibilityNo cancel feeOn-time63%
Hawaiian AirlinesCheapest$237Average$366FlexibilityNo cancel feeOn-time85%
DeltaCheapest$256Average$380FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$256Average$383FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$261Average$358FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$271Average$429FlexibilityNo cancel feeOn-time69%

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