Washington to Buenos Aires flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Washington to Buenos Aires is €266 with United Airlines (checked on 22 Oct 2026).
Your next trip, last seen at €266
Lowest observedUnited Airlines · 1 stop · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €266, departing 16 Nov 2026 (Last checked: 22 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 9Check live prices for this route
- Airlines seen
- Aerolineas Argentinas, Avianca, Copa Airlines, Frontier Airlines, JetBlue, JetSmart, LATAM Airlines, TAP Air Portugal, United Airlines (9)
- Typical journey time
- 15h 13m
About this route
Explore the fares we observed from Washington to Buenos Aires. Prices move often, so pick your dates to see the latest options.
- Route distance
- 8,396 km
- Typical journey time
- 15h 13m
- Seen on fares with a connection
- United Airlines, LATAM Airlines, Frontier Airlines, Copa Airlines, TAP Air Portugal, Aerolineas Argentinas
- Alternative airports
- DCA, AEP
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- Ronald Reagan Washington National Airport (DCA) → Washington, city gazetteer reference point (38.8951, -77.0364): ≈ 5 km.
- Washington Dulles International Airport (IAD) → Washington, city gazetteer reference point (38.8951, -77.0364): ≈ 37 km.
- Aeroparque Jorge Newbery (AEP) → Buenos Aires, city gazetteer reference point (-34.6084, -58.3732): ≈ 7 km.
- Ezeiza International Airport - Ministro Pistarini (EZE) → Buenos Aires, city gazetteer reference point (-34.6084, -58.3732): ≈ 28 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest one-way fare we saw per airline
Cheapest airline from Washington to Buenos Aires: United Airlines, from €266 (checked 22 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| United Airlines | €266Nov 16, 2026 | 48 |
| LATAM Airlines | €271Nov 15, 2026 | 10 |
| Frontier Airlines | €329Nov 9, 2026 | 7 |
| Copa Airlines | €375Dec 10, 2026 | 3 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Washington to Buenos Aires?
The lowest fare Routavio has observed is €266, found on 22 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Washington to Buenos Aires?
In our observations November 2026 is the cheapest month so far, at €266.
Are there direct flights from Washington to Buenos Aires?
Our data holds no non-stop flight from Washington to Buenos Aires. The fares on this page include at least one stop.
Which airlines fly from Washington to Buenos Aires?
Routavio has seen these carriers on the route: Aerolineas Argentinas, Avianca, Copa Airlines, Frontier Airlines, JetBlue, JetSmart, LATAM Airlines, TAP Air Portugal, United Airlines (9).
How long does the flight from Washington to Buenos Aires take?
Across the 63 fares Routavio observed, the average journey time is 18h 59m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Washington to Buenos Aires fares were non-stop?
None of the 72 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
Which airline has the lowest fare from Washington to Buenos Aires?
Cheapest airline from Washington to Buenos Aires: United Airlines, from €266 (checked 22 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.