Cheapflights Tip: The best prices from San Diego to Washington, D.C. are usually found in August or May, booked 37 days in advance, depart on a Tuesday or Monday and return on a Monday
Find flight deals from San Diego to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Washington, D.C. (WAS). 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 20 March 2026.
Popular in
July
Cheapest in
August
Average price
£305
Good round-trip deal
£912 or less
Highest demand for flights based on searches. 2% potential increase in price (£4 potential increase over avg. return price).
Best time to book a flight from San Diego to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from San Diego with our price prediction graph.
SAN-WAS
Estimated return 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 San Diego to Washington, D.C.
Prices
Airlines
Delays
How far ahead should I book a flight from San Diego to Washington, D.C.?
Use this chart to determine the optimal time to book a return flight from San Diego to Washington, D.C.. Price data was last updated on 13 March 2026.
To ensure you get the cheapest price possible for a flight from San Diego to Washington, D.C., you should look to book at least 37 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from San Diego to Washington, D.C.?
Currently, June is the cheapest month in which you can book a flight from San Diego to Washington, D.C. (average of £74). Flying from San Diego to Washington, D.C. in December is currently the most expensive (average of £140). 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 SAN to WAS?
Find hourly flight availability from San Diego to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 March 2026.
When flying from San Diego to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from San Diego to Washington, D.C.
Explore weekly flight availability from San Diego to Washington, D.C.. 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 20 March 2026.
The most flights from SAN to WAS are scheduled on a Thursday (13 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).
How often are flights from San Diego to Washington, D.C. delayed?
About 13% of weekly flights between San Diego and Washington, D.C. have experienced delays in the past year, with the average delay time being 143 minutes.
What is the most punctual flight time for San Diego to Washington, D.C. flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Diego to Washington, D.C. flights?
Over the past year, United Airlines have had the lowest number of delays on this route, with just 9% of flights being delayed.
Related info for your journey
Find useful and relevant information for your journey from San Diego to Washington, D.C.. 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 from for flights from San Diego to Washington, D.C.?
San Diego (SAN) is the airport you will fly out of if you book a flight from San Diego to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from San Diego; the airport handles an average of 10 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the San Diego airport to Washington, D.C.. It is only a 2.6 mi journey to San Diego (SAN) from San Diego’s city center.
What are the most reliable airlines from San Diego to Washington, D.C.?
No one likes to see their flight delayed. When booking a flight from San Diego to Washington, D.C. consider choosing Ethiopian Air (93%), United Airlines (93%) or American Airlines (87%) as they are the most reliable in getting you off to your destination on time.
Can I find deals for flights from San Diego to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on San Diego to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Diego to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Washington, D.C..
Can I find deals for business class flights from San Diego to Washington, D.C.?
Yes. Cheapflights offers flight deals from San Diego to Washington, D.C. 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 San Diego to Washington, D.C.?
Currently, June is the cheapest month in which you can book a flight from San Diego to Washington, D.C. (average of £74). Flying from San Diego to Washington, D.C. in December is currently the most expensive (average of £140). 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.
Explore flights to Washington, D.C. departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 20 March 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from San Diego to Washington, D.C.?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Diego to Washington, D.C.. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from San Diego to Washington, D.C.?
Millions of users choose and trust Cheapflights to book the best flight deals from San Diego to Washington, D.C. for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from San Diego to Washington, D.C. with no change fees?
Yes, we can. To see specific flights from San Diego to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from San Diego to Washington, D.C. become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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