Cheap flights from Washington to San Diego from $139 DCA, IAD → CLD, SAN
Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) → McClellan-Palomar Airport (CLD), San Diego International Airport (SAN)
The cheapest return found recently is $281 with Frontier Airlines, 4 Jan 2027 – 26 Jan 2027, found 6 hours ago. The cheapest one-way found recently is $139 with Frontier Airlines, 11 Jan 2027, found yesterday.
- Cheapest one-way found recently
- $139, found yesterday
- Cheapest return found recently
- $281, 4 Jan 2027 to 26 Jan 2027
- Usual return price
- $330 to $473
- Cheapest month to fly
- January 2027, return fares from $281 found in the last 7 days
- Airlines with nonstop flights
- Alaska Airlines, American Airlines
Return
The cheapest return fare on each of 5 departure dates is usually $330 to $473.
Cheapest return found recently
$281
4 Jan 2027 – 26 Jan 2027 · Frontier Airlines
Ronald Reagan National Airport (DCA) → San Diego International Airport (SAN)
Leaves 6:05 p.m. · Return leaves 6:25 a.m. · 16 h 27 min of travel, both ways together
out 1 stop, back 1 stop · via Denver International Airport (DEN)
found 6 hours ago
Cheapest nonstop return
$357
4 Jan 2027 – 26 Jan 2027 · Alaska Airlines
Washington Dulles International Airport (IAD) → San Diego International Airport (SAN)
Leaves 7:13 p.m. · Return leaves 9:56 a.m. · 10 h 39 min of travel, both ways together
out nonstop, back nonstop
found 6 hours ago
Found recently, and the cheapest we hold
$281 4 Jan 2027 – 26 Jan 2027found 6 hours agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 46 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $226 to $621.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 5 departure dates from 14 Nov to 4 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 22-night return fares leaving within 3 days of 4 Jan 2027 to compare.
Every date we hold
73 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 14 Nov – 15 Nov | $330 | Alaska Airlines | Washington Dulles International Airport (IAD) → San Diego International Airport (SAN) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 20 Nov – 27 Nov | $473 | Frontier Airlines | Washington Dulles International Airport (IAD) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 1 Dec – 24 Dec | $371 | Frontier Airlines | Washington Dulles International Airport (IAD) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 27 Dec – 2 Jan 2027 | $625 | Alaska Airlines | Washington Dulles International Airport (IAD) → San Diego International Airport (SAN) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 4 Jan 2027 – 26 Jan 2027 | $281 | Frontier Airlines | Ronald Reagan National Airport (DCA) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found 6 hours ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $281.
Airlines on the cheapest dates: Frontier Airlines, Alaska Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$139
11 Jan 2027 · Frontier Airlines
Ronald Reagan National Airport (DCA) → San Diego International Airport (SAN)
Leaves 6:00 p.m. · 8 h 58 min trip
1 stop
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$139 11 Jan 2027found yesterdayOpen this trip
$137 24 Novfound 4 days agoOpen this trip
What have prices looked like?
Over 15 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $126 to $213.
15 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 11 Jan 2027 to compare.
Every date we hold
3 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 24 Nov | $137 | Alaska Airlines | Washington Dulles International Airport (IAD) → San Diego International Airport (SAN) | stops unknown | found 4 days ago | Open this trip |
| 11 Jan 2027 | $139 | Frontier Airlines | Ronald Reagan National Airport (DCA) → San Diego International Airport (SAN) | 1 stop | found yesterday | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $137.
Airlines on the cheapest dates: Alaska Airlines, Frontier Airlines.
Premium cabin fares from Washington to San Diego
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 4 Jan 2027 – 26 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 11 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Washington to San Diego?
Return
Fares 14 to 29 days before departure were typically 39% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 12 Nov (46 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $534 | $330 | +64% | 11 |
| 7–13 days | $417 | $366 | +28% | 17 |
| 14–29 days | $325 | $325 | Cheapest seen | 12 |
| 30–59 days | $342 | $226 | +5% | 30 |
| 90–179 days | $474 | $326 | +46% | 16 |
| 180+ days | $460 | $460 | +42% | 8 |
One-way
Not enough history yet: in 15 days of one-way prices, 24 Sept to 12 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Baltimore → San Diego
57 km from Washington
$414
$133 more than flying from Washington
1 Dec – 24 Dec · BWI → SAN · out 3 stops, back nonstop
found today
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Baltimore → San Diego
57 km from Washington
$159
$20 more than flying from Washington
11 Jan 2027 · BWI → SAN · 3 stops
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 4 Jan 2027 – 26 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Washington to San Diego?
The cheapest return found recently is $281 with Frontier Airlines, 4 Jan 2027 to 26 Jan 2027, found 6 hours ago. The cheapest return fare on each of 5 departure dates is usually $330 to $473.
How much is a one-way flight from Washington to San Diego?
The cheapest one-way found recently is $139 with Frontier Airlines, 11 Jan 2027, found yesterday. The cheapest one-way we hold, of any age, is $137 with Alaska Airlines, 24 Nov, found 4 days ago.
What is the cheapest month to fly from Washington to San Diego?
January 2027 is the cheapest month for a return, from $281, 4 Jan 2027 to 26 Jan 2027, found 6 hours ago. November 2026 is the cheapest month for a one-way, from $137, 24 Nov, found 4 days ago.
How far ahead should I book a flight from Washington to San Diego?
In 46 days of prices between 24 Sept and 12 Nov, return fares 14 to 29 days before departure were typically 39% lower than 0 to 6 days before departure.
Is there a direct flight from Washington to San Diego?
Yes, the cheapest nonstop return found recently is $357 with Alaska Airlines, 4 Jan 2027 to 26 Jan 2027, found 6 hours ago.
How long is the flight from Washington to San Diego?
The cheapest one-way found recently, with Frontier Airlines on 11 Jan 2027, takes 8 h 58 min with 1 stop.
Which airlines have the cheapest flights from Washington to San Diego?
Between 14 Nov and 4 Jan 2027, Frontier Airlines has the cheapest return on 3 of the 5 departure dates we hold, and Alaska Airlines on 2.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work