Frontier AirlinesDepart08:57
Mon, Dec 7SAN → BWI
7h 19m · 2 stops
$106one way, per person
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- Cheapest fare
- $106
- Cheapest month
- December
- Direct flights
- Not recently
- Quickest trip
- 5h 51m
Frontier Airlines · Mon, Dec 7
from $106
Usually 1+ stop
3,650 km
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Cheapest month to fly from San Diego to Washington
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
See every date in December 2026 →Plan the rest of your trip to Washington
Where to stay, what to do and getting around, from our travel partners.
About flights from San Diego to Washington
San Diego (SAN) and Washington (WAS) are about 3,650 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 5h 51m. Over the next few months, one-way fares start from $106, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from San Diego to Washington?
The cheapest one-way fare we've seen recently is $106 with Frontier Airlines, departing Monday, December 7, 2026. Over the coming months, the lowest fare in each month ranges from $106 to $244.
What is the cheapest month to fly from San Diego to Washington?
December 2026 currently has the lowest fares, from $106 one way.
Are there direct flights from San Diego to Washington?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from San Diego to Washington?
The quickest journey we've seen takes about 5h 51m. San Diego and Washington are around 3,650 km apart.
Which airlines fly from San Diego to Washington?
Recent fares on this route were with Frontier Airlines.
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