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Washington to San Francisco DCA, IAD → SFO

Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) → San Francisco International Airport (SFO)

The cheapest return found recently is $399 with Frontier Airlines, 22 Dec – 29 Dec, found yesterday.

Return

The cheapest return fare on each of 6 departure dates is usually $294 to $381.

Cheapest return found recently

$399

22 Dec – 29 Dec · Frontier Airlines

Ronald Reagan National Airport (DCA) → San Francisco International Airport (SFO)

Leaves 6:05 p.m. · Return leaves 9:23 p.m. · 21 h 32 min of travel, both ways together

out 1 stop, back 1 stop

found yesterday

See prices for these datesCheck today's price

Cheapest nonstop return

None seen yet.

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Found recently, and the cheapest we hold

Cheapest found recently $399 22 Dec – 29 Decfound yesterdaySee prices for these dates

Cheapest we hold, of any age $260 9 Nov – 18 Novfound 4 days agoSee prices for these dates

What have prices looked like?

Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $193 to $514.

$399, the cheapest return found recently, sits here in that range of $193 to $514.

25 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 return price?

Compared with the cheapest return fare on each of 6 departure dates from 30 Oct to 22 Dec, 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 7-night return fares leaving within 3 days of 22 Dec to compare.

Every date we hold

16 fares on 6 departure dates

30 Oct – 1 Nov: $461, found 6 days ago9 Nov – 18 Nov: $260, found 4 days ago10 Nov – 19 Nov: $320, found 4 days ago13 Nov – 22 Nov: $285, found 4 days ago18 Nov – 22 Nov: $325, found 2 days ago22 Dec – 29 Dec: $399, found yesterdayOctNovDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
30 Oct – 1 Nov$461Alaska AirlinesWashington Dulles International Airport (IAD) → San Francisco International Airport (SFO)out 1 stop, back 2 stopsfound 6 days agoSee prices for these dates
9 Nov – 18 Nov$260Frontier AirlinesRonald Reagan National Airport (DCA) → San Francisco International Airport (SFO)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
10 Nov – 19 Nov$320Frontier AirlinesRonald Reagan National Airport (DCA) → San Francisco International Airport (SFO)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
13 Nov – 22 Nov$285Frontier AirlinesRonald Reagan National Airport (DCA) → San Francisco International Airport (SFO)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
18 Nov – 22 Nov$325Frontier AirlinesWashington Dulles International Airport (IAD) → San Francisco International Airport (SFO)out 1 stop, back 1 stopfound 2 days agoSee prices for these dates
22 Dec – 29 Dec$399Frontier AirlinesRonald Reagan National Airport (DCA) → San Francisco International Airport (SFO)out 1 stop, back 1 stopfound yesterdaySee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $260.

October 2026From $4611 departure date30 Oct – 1 Nov · found 6 days agoSee prices for these dates
November 2026From $260Cheapest seen4 departure dates9 Nov – 18 Nov · found 4 days agoSee prices for these dates
December 2026From $3991 departure date22 Dec – 29 Dec · found yesterdaySee prices for these dates

Airlines on the cheapest dates: Frontier Airlines, Alaska Airlines.

Premium cabin fares from Washington to San Francisco

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 22 Dec – 29 Dec in another cabin: Premium economy · Business · First

How far ahead were prices cheapest for Washington to San Francisco?

Return

Fares 14 to 29 days before departure were typically 41% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 18 Oct (25 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
Typical price in each booking range — round trip, per traveler in Economy.
Booked ahead byTypical fareCheapest dayAbove the cheapestDays of prices
0–6 days$520$449+68%17
7–13 days$476$334+54%11
14–29 days$309$260Cheapest seen12
30–59 days$325$193+5%18
60–89 days$399$286+29%13
90–179 days$591$591+91%7

Could a nearby airport be cheaper?

A different airport at either end can change the fare — sometimes a lot.

Return

Baltimore → San Francisco

57 km from Washington

$430

$31 more than flying from Washington

22 Dec – 29 Dec · BWI → SFO · out 1 stop, back 2 stops

found yesterday

See this route

Washington → San Jose

67 km from San Francisco

$417

$18 more than flying to San Francisco

1 Mar 2027 – 6 Mar 2027 · DCA → SJC · out 1 stop, back 1 stop

found 5 days ago

Check today's price

Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.

Live price for these dates

The cheapest return found recently is for 22 Dec – 29 Dec. A live search on this page shows what those dates cost now, for one adult in economy.

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