Find cheap airlines flights from Seattle to Buenos Aires

Choose from 2 carriers that fly from Seattle to Buenos Aires, including United Airlines, Delta Air Lines, Enjoy the cheapest tickets on this route with Delta Air Lines.

Find flight deals from Seattle to Buenos Aires for the next 3 months. Book one way flights from $504 or round trip flights from $970.

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Info | Seattle to Buenos Aires

The distance between Seattle and Buenos Aires is about 11,117.39 km. The most popular month to Buenos Aires is July. The off-season for travel is October.

Cheapest one-way flight price$504
Cheapest round-trip ticket price$970
Off-season for travelOctober
Peak season for travelJuly
Flight distance11,117.39 km
Popular airlineUnited Airlines

When is the cheapest time to fly from Seattle to Buenos Aires?

The cheapest time for Seattle to Buenos Aires flights: Nov 30 to Dec 7 — one way flight prices from $356.

Cheapest flights
From price
Search
  • 1623
  • 2330
  • Dec

    307
  • 714
  • 1421
  • 2128
  • Jan

    284
  • 411
  • 1118
  • 1825
  • Feb

    251
  • 18
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • Which airlines offer flights from Seattle to Buenos Aires?

    At the moment, several airlines serve connecting flights from Seattle to Buenos Aires, including: United Airlines Delta Air Lines Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Buenos Aires is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • The cheapest months to fly from Seattle to Buenos Aires is October, when demand for travel is lower.
  • After crunching the numbers on our November flight calendar, it's currently cheapest to fly from Seattle to Buenos Aires on November 21, 2025 with Air Canada, with prices starting at $563.
  • You can land at any one of the following hubs in Buenos Aires, with Seattle–Tacoma International Airport to Jorge Newbery Airport (SEA-AEP) is by far the most common option on this route: Ministro Pistarini International Airport (EZE) Jorge Newbery Airport (AEP).
  • The time difference between Buenos Aires and Seattle is 5h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.