Cheap flights from Seattle to Buenos Aires from $396
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Buenos Aires departing on 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Copa Airlines flights from Seattle to Buenos Aires
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How to get the cheapest flight ticket from Seattle to Buenos Aires
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Seattle and Buenos Aires?
What is the cheapest month to fly to Buenos Aires?
The cheapest month to fly to Buenos Aires from Seattle is in October. Flight prices, which tend to average around $1,225, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Buenos Aires from Seattle during May instead. Flights to Buenos Aires in May, while not as cheap as those in October, still average around $1,278.
What is the cheapest day to depart on your flight to Buenos Aires?
On average, the least expensive day to fly to Buenos Aires from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,328. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Saturday is $1,503.
What is the cheapest time of day to depart on your flight to Buenos Aires?
Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from Seattle to Buenos Aires during this time can be as low as $1,307. Try not to purchase tickets at noon because they tend to be around $1,438. Of course, these prices can vary depending on the time of year and what airport you fly to.
How far in advance should I book a flight to Buenos Aires?
You are more likely to see cheaper flights to Buenos Aires from Seattle when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,368 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Seattle for as low as $1,200 on momondo.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Buenos Aires?
Air Canada, Copa Airlines, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Buenos Aires
What airlines fly to Buenos Aires?
United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Buenos Aires from Seattle according to our data. United Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Buenos Aires. Keep in mind that there are 4 different airlines that fly to Buenos Aires on a routine basis, so you have a few additional options to choose from.
When to book flights from Seattle to Buenos Aires
Cheap Seattle to Buenos Aires (SEA to BUE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Buenos Aires
How far is Seattle/Tacoma Intl to Buenos Aires by plane?
The straight-line distance from Seattle/Tacoma Intl to Buenos Aires is 6914.0 mi. Typically, this will take 16h 03m by plane in normal conditions.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Buenos Aires?
Prices for flights from Seattle/Tacoma Intl Airport to Buenos Aires are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Buenos Aires?
As of June 2025, there are 4 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Buenos Aires.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Buenos Aires?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Buenos Aires.
What documentation or ID do you need to fly to Buenos Aires?
The necessary travel and health documents for your Buenos Aires trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Seattle to Buenos Aires?
Based on momondo bookings for flights between Seattle and Buenos Aires, the leading airline is Delta, making up 39% of the total bookings. Other popular airlines include American Airlines with 30%, United Airlines with 21%, and LATAM Airlines with 7%.
Best airlines flying from Seattle to Buenos Aires
Compare and see reviews for airlines that fly from Seattle to Buenos Aires with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,100 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,113 | Free Cancellation | Rating 7.5 1,785 reviews | |||
| PriceFrom $1,113 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $1,200 | Free Cancellation | Rating 7.4 8,790 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Buenos Aires?
Finding the right flight to Buenos Aires from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Buenos Aires quick and easy, saving you time and money.
Can I find flights from Seattle to Buenos Aires with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Buenos Aires from Seattle with this policy.
How can momondo help me find flights from Seattle to Buenos Aires?
momondo provides multiple filters to help you find the best flight to Buenos Aires from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Seattle to Buenos Aires right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seattle to Buenos Aires flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.