$139 Cheap Delta flights Washington (IAD) to San Diego (SAN)

View $139 flight on Tue, Sep 9, 2025Opens in a new window

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$139 Cheap Delta flights Washington (IAD) to San Diego (SAN)

Prices were available within the past 7 days and start at $139 for one-way flights and $277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Sep 17 - Sun, Sep 21
IAD
Washington
SAN
San Diego
$277 Roundtrip, found 2 hours ago
$277
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Sep 17 from Washington to San Diego, returning Sun, Sep 21, priced at $277 found 2 hours ago
Flights from Washington (IAD) to San Diego (SAN)
Origin airport
Washington Dulles Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Popular airline
Alaska Airlines
Distance
2249 mi
Average flight time
2 hours 22 mins

Frequently asked questions

How much is a Delta Air Lines flight from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
Set the "Price (lowest to highest)" filter on Expedia to find cheap Delta Air Lines round-trip flights from $277 from IAD to SAN. Affordable one-way tickets from $139 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to SAN with Delta Air Lines?
Browse for one-way or round-trip flights to San Diego in January or November. You could find cheaper fares with Delta Air Lines during these off-peak months.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN) with Delta Air Lines?
For cheap Delta Air Lines fares from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect how much you pay. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
Simply enter your dates, click search and tick the "Nonstop" filter on Expedia to browse any direct flights from IAD to SAN with Delta Air Lines or other carriers.
What is the earliest Delta Air Lines flight from IAD to SAN?
To find the earliest departures from IAD to SAN with Delta Air Lines, sort your results by "Morning" and "Early Morning." Booking an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in San Diego?
San Diego Intl. Airport (SAN) is the primary San Diego gateway for Delta Air Lines flights from Washington Dulles Intl. Airport (IAD).
Why fly with Delta Air Lines from IAD to SAN?
Offering a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a top choice for many travelers flying from IAD to SAN. Also, if you're a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
It's generally possible to cancel or modify your flight, although additional fees may apply if you booked over 24 hours ago. Prefer to keep your options open? Make use of our "Changes included" or "No cancel fee" filter to find flights that won't penalize you if you need to alter your plans. To update your booking, head to "Trips," select your flight and click on "Manage Booking" for more information.

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