Washington to San Salvador in December 2026 DCA, IAD → SAL

Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)

For departures in December 2026, the cheapest return found recently is $758 with Frontier Airlines, 23 Dec – 25 Dec, found yesterday.

Return

In December 2026, the cheapest return fare on each of 7 departure dates is usually $725 to $829. Across all 14 departure dates we hold on this route, it is usually $700 to $814. Of the 2 months with enough return fares to compare, December 2026 is usually the most expensive.

Cheapest return found recently

$758

23 Dec – 25 Dec · Frontier Airlines

Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)

out 3 stops, back 1 stop

found yesterday

See prices for these dates Check today's price

Cheapest we hold, of any age

$634

17 Dec – 23 Dec · United Airlines

Ronald Reagan National Airport (DCA) → El Salvador International Airport (SAL)

out 1 stop, back 1 stop

found 6 days ago

See prices for these dates Check today's price

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The cheapest dates in December 2026

Dates	From	Airline	Stops	Found
17 Dec – 23 Dec	$634	United Airlines	out 1 stop, back 1 stop	found 6 days ago	See prices for these dates
31 Dec – 14 Jan 2027	$691	avianca airlines	out 1 stop, back nonstop	found 4 days ago	See prices for these dates
23 Dec – 25 Dec	$758	Frontier Airlines	out 3 stops, back 1 stop	found yesterday	See prices for these dates
11 Dec – 16 Dec	$780	United Airlines	out nonstop, back nonstop	found 5 days ago	See prices for these dates
19 Dec – 26 Dec	$822	Frontier Airlines	out 2 stops, back nonstop	found yesterday	See prices for these dates

Every date we hold

7 departure dates

See the chart as a table

The cheapest price seen for each departure date — per traveler in Economy.
Dates	From	Airline	Airports	Stops	Found
11 Dec – 16 Dec	$780	United Airlines	Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)	out nonstop, back nonstop	found 5 days ago	See prices for these dates
16 Dec – 26 Dec	$835	avianca airlines	Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)	out 1 stop, back nonstop	found yesterday	See prices for these dates
17 Dec – 23 Dec	$634	United Airlines	Ronald Reagan National Airport (DCA) → El Salvador International Airport (SAL)	out 1 stop, back 1 stop	found 6 days ago	See prices for these dates
18 Dec – 25 Dec	$888	Frontier Airlines	Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)	out 1 stop, back 1 stop	found yesterday	See prices for these dates
19 Dec – 26 Dec	$822	Frontier Airlines	Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)	out 2 stops, back nonstop	found yesterday	See prices for these dates
23 Dec – 25 Dec	$758	Frontier Airlines	Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)	out 3 stops, back 1 stop	found yesterday	See prices for these dates
31 Dec – 14 Jan 2027	$691	avianca airlines	Washington Dulles International Airport (IAD) → El Salvador International Airport (SAL)	out 1 stop, back nonstop	found 4 days ago	See prices for these dates

Which month looks cheapest?

December 2026 is the cheapest month — from $634.

October 2026From $6572 departure dates24 Oct – 26 Oct · found 3 days agoSee prices for these dates

November 2026From $7274 departure dates27 Nov – 14 Dec · found todaySee prices for these dates

December 2026From $634Cheapest seen7 departure dates17 Dec – 23 Dec · found 6 days agoSee prices for these dates

January 2027From $6691 departure date6 Jan 2027 – 13 Jan 2027 · found todaySee prices for these dates

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