Cheap flights from Washington to Buenos Aires from $574 DCA, IAD → AEP, EZE
Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) → Jorge Newbery Airport (AEP), Ministro Pistarini Airport (EZE)
The cheapest return found recently is $574 with avianca airlines, 18 Feb 2027 – 28 Feb 2027, found yesterday.
- Cheapest return found recently
- $574, 18 Feb 2027 to 28 Feb 2027
- Usual return price
- $568 to $1,083
- Cheapest month to fly
- November 2026, return fares from $551 found in the last 7 days
Return
The cheapest return fare on each of 4 departure dates is usually $568 to $1,083.
Cheapest return found recently
$574
18 Feb 2027 – 28 Feb 2027 · avianca airlines
Washington Dulles International Airport (IAD) → Ministro Pistarini Airport (EZE)
Leaves 2:30 p.m. · Return leaves 7:05 a.m. · 46 h 35 min of travel, both ways together
out 1 stop, back 1 stop · via El Dorado International Airport (BOG) · overnight connection · 11 h connection
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$574 18 Feb 2027 – 28 Feb 2027found yesterdaySee prices for these dates
$551 15 Nov – 20 Novfound 2 days agoSee prices for these dates
What have prices looked like?
Over 29 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $463 to $1,461.
29 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 4 departure dates from 15 Nov to 18 Feb 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 10-night return fares leaving within 3 days of 18 Feb 2027 to compare.
Every date we hold
86 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 15 Nov – 20 Nov | $551 | American Airlines | Ronald Reagan National Airport (DCA) → Ministro Pistarini Airport (EZE) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 15 Dec – 22 Dec | $1,059 | American Airlines | Ronald Reagan National Airport (DCA) → Ministro Pistarini Airport (EZE) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 30 Dec – 11 Jan 2027 | $1,154 | United Airlines | Washington Dulles International Airport (IAD) → Ministro Pistarini Airport (EZE) | out 1 stop, back 3 stops | found 2 days ago | See prices for these dates |
| 18 Feb 2027 – 28 Feb 2027 | $574 | avianca airlines | Washington Dulles International Airport (IAD) → Ministro Pistarini Airport (EZE) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $551.
Airlines on the cheapest dates: American Airlines, United Airlines, avianca airlines.
Premium cabin fares from Washington to Buenos Aires
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 18 Feb 2027 – 28 Feb 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Washington to Buenos Aires?
Return
Fares 90 to 179 days before departure were typically 21% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 12 Nov (29 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 | $722 | $551 | +26% | 11 |
| 14–29 days | $640 | $640 | +12% | 7 |
| 30–59 days | $940 | $940 | +64% | 13 |
| 60–89 days | $1,318 | $1,318 | +130% | 13 |
| 90–179 days | $574 | $463 | Cheapest seen | 7 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Baltimore → Buenos Aires
57 km from Washington
$899
$325 more than flying from Washington
18 Feb 2027 – 28 Feb 2027 · BWI → EZE · out 1 stop, back 1 stop
found yesterday
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 18 Feb 2027 – 28 Feb 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 Buenos Aires?
The cheapest return found recently is $574 with avianca airlines, 18 Feb 2027 to 28 Feb 2027, found yesterday. The cheapest return we hold, of any age, is $551 with American Airlines, 15 Nov to 20 Nov, found 2 days ago. The cheapest return fare on each of 4 departure dates is usually $568 to $1,083.
What is the cheapest month to fly from Washington to Buenos Aires?
November 2026 is the cheapest month for a return, from $551, 15 Nov to 20 Nov, found 2 days ago.
How far ahead should I book a flight from Washington to Buenos Aires?
In 29 days of prices between 24 Sept and 12 Nov, return fares 90 to 179 days before departure were typically 21% lower than 0 to 6 days before departure.
Which airlines have the cheapest flights from Washington to Buenos Aires?
Between 15 Nov and 18 Feb 2027, American Airlines has the cheapest return on 2 of the 4 departure dates we hold, United Airlines on 1 and avianca airlines on 1.
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