SEA - BUE

$400 Find Cheap Flights from Seattle to Buenos Aires

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Buenos Aires departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Buenos Aires

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Buenos Aires, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Buenos Aires, as well as popular online travel agencies
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Cheap Flights from Seattle to Buenos Aires (SEA-BUE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Buenos Aires that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Buenos Aires

Sat, Oct 18 - Sat, Nov 1
LATAM Airlines Logo
11:29 am - 12:00 pmSEA-AEP
44h 31m2 stops
LATAM Airlines Logo
8:25 pm - 2:02 pmAEP-SEA
21h 37m2 stops
$868LATAM Airlines
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Tue, Dec 2 - Tue, Dec 9
LATAM Airlines Logo
8:00 am - 9:15 amSEA-EZE
20h 15m2 stops
LATAM Airlines Logo
7:43 pm - 2:27 pmEZE-SEA
23h 44m2 stops
$1,023LATAM Airlines
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Fri, Nov 7 - Thu, Nov 20
Copa Airlines Logo
3:48 pm - 1:00 amSEA-EZE
28h 12m2 stops
Copa Airlines Logo
5:11 am - 11:10 pmEZE-SEA
22h 59m2 stops
$1,028Copa Airlines
Find Deal
Mon, Aug 25 - Mon, Sep 8
LATAM Airlines Logo
8:35 am - 11:57 amSEA-EZE
23h 22m2 stops
LATAM Airlines Logo
6:13 pm - 12:34 pmEZE-SEA
22h 21m2 stops
$1,031LATAM Airlines
Find Deal
Thu, Aug 28 - Thu, Sep 4
Copa Airlines Logo
6:25 am - 7:52 amSEA-EZE
21h 27m2 stops
Copa Airlines Logo
2:33 pm - 10:15 pmEZE-SEA
35h 42m2 stops
$1,038Copa Airlines
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Mon, Aug 25 - Sun, Sep 7
Delta Logo
9:45 pm - 5:55 amSEA-EZE
28h 10m2 stops
Delta Logo
3:55 am - 10:23 pmEZE-SEA
22h 28m2 stops
$1,058Delta
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Thu, Aug 14 - Wed, Aug 27
Delta Logo
7:20 am - 9:45 amSEA-EZE
22h 25m1 stop
Delta Logo
7:40 am - 10:23 pmEZE-SEA
42h 43m2 stops
$1,059Delta
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Mon, Aug 25 - Mon, Sep 8
American Airlines Logo
7:45 am - 7:25 amSEA-EZE
19h 40m2 stops
American Airlines Logo
10:30 pm - 11:59 pmEZE-SEA
29h 29m1 stop
$1,071American Airlines
Find Deal
Mon, Dec 1 - Tue, Dec 9
American Airlines Logo
12:59 am - 8:15 amSEA-EZE
26h 16m1 stop
American Airlines Logo
10:25 pm - 12:38 pmEZE-SEA
19h 13m1 stop
$1,089American Airlines
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Sun, Nov 30 - Mon, Dec 15
United Airlines Logo
11:59 pm - 7:20 amSEA-EZE
26h 21m2 stops
United Airlines Logo
10:05 pm - 9:00 pmEZE-SEA
27h 55m3 stops
$1,180United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Buenos Aires flights

Get data-powered insights and trends into flights from Seattle to Buenos Aires to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Buenos Aires?

The average price of all round-trip flights from Seattle to Buenos Aires clicked on KAYAK for each day over the last 12 months.

For Seattle to Buenos Aires, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Buenos Aires back to Seattle, the best deals are generally found on Tuesday, with Sunday being the most expensive.

What is the cheapest month to fly from Seattle to Buenos Aires?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Buenos Aires, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Buenos Aires is August, where tickets cost $1,230 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,625 and $1,464 respectively.

How far in advance should I book a flight from Seattle to Buenos Aires?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Buenos Aires, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Buenos Aires, you should book around 6 weeks before departure, which saves you about 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJuly
Cheapest flight$400
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly with an average 19% increase in price.
Flight from Seattle to Buenos Aires Ministro Pistarini

When to book flights from Seattle to Buenos Aires

Are your dates flexible? Find out the best times to travel from Seattle to Buenos Aires based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Buenos Aires

  • Can I travel with pets on the flight from Seattle to Buenos Aires?

    Delta Air Lines and Alaska Airlines allow pets to travel with their owners in the cabin or as checked baggage. Delta Air Lines permits small dogs, cats, and household birds, while Alaska Airlines allows a wider range of pets, including dogs, cats, rabbits, and birds. Specific guidelines and restrictions apply, such as carrier dimensions and health documentation, so check with the respective airlines for detailed pet travel policies.

  • What services are available for kids on the flight from Seattle to Buenos Aires?

    Delta Air Lines and Alaska Airlines offer various services for young travelers. Delta Air Lines provides Sky Zone, an in-flight entertainment channel dedicated to kids, and complimentary snacks. Alaska Airlines offers the "Fly With Me" animals program, providing collectible plush toys and activity packs. Both airlines also have child-friendly meals and options to pre-board families traveling with children.

  • How can I get from the airport to the city center of Buenos Aires?

    Ezeiza International Airport (Ministro Pistarini) (EZE) is the main airport in Buenos Aires. Taxi services like Taxi Ezeiza, ride-hailing services, and Manuel Tienda León buses are available for transportation to the city center. For Jorge Newbery Airport (AEP), similar transportation options apply. Please verify availability before traveling.

  • Do these airlines cater to special dietary requirements?

    Delta Air Lines and Alaska Airlines offer special meals to accommodate different dietary needs. Delta Air Lines provides vegetarian, vegan, gluten-free, and kosher meals. Alaska Airlines offers special meals for specific dietary preferences, including vegetarian, vegan, gluten-free, and diabetic meals.

  • What is the cheapest flight from Seattle to Buenos Aires?

    In the last 3 days, the lowest price for a flight from Seattle to Buenos Aires was $400 for a one-way ticket and $868 for a round-trip.

  • Do I need a passport to fly between Seattle and Buenos Aires?

    Yes, you’ll need a passport to travel to Buenos Aires from Seattle.

  • Which airports will I be using when flying from Seattle to Buenos Aires?

    Seattle is served by only 1 airport and there are 2 airports in Buenos Aires. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Buenos Aires at one of these airports: Buenos Aires Jorge Newbery or Buenos Aires Ministro Pistarini.

  • Which aircraft models fly most regularly from Seattle to Buenos Aires?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Buenos Aires?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Seattle and Buenos Aires, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Buenos Aires from Seattle?

    Dallas is the most popular layover city among KAYAK users traveling from Seattle to Buenos Aires.

  • Which is the best airline for flights from Seattle to Buenos Aires, Delta or LATAM Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Buenos Aires are Delta and LATAM Airlines. With an average price for the route of $1,447 and an overall rating of 8.0, Delta is the most popular choice. LATAM Airlines is also a great choice for the route, with an average price of $1,195 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Seattle to Buenos Aires?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Buenos Aires.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Buenos Aires?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buenos Aires from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Buenos Aires?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Buenos Aires with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Buenos Aires?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Buenos Aires from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Buenos Aires

  • When searching for cheap flights from Seattle to Buenos Aires, consider checking the ticket classes various airlines offer. For example, Delta Air Lines provides classes such as Economy, Comfort+, and First Class, each with benefits and pricing options. Alaska Airlines offers Main Cabin, Premium Class, and First Class, catering to different traveler preferences and budgets.
  • Look out for airlines that offer special amenities to enhance your travel experience. For instance, United Airlines provides complimentary in-flight Wi-Fi, power outlets at each seat, and personal entertainment systems on select flights. American Airlines offers priority boarding for certain fare classes, allowing you to settle in and relax more quickly.
  • If you're concerned about reducing your carbon footprint, consider airlines that prioritize sustainability. For example, Alaska Airlines is committed to minimizing emissions by using sustainable aviation fuel and operating more fuel-efficient aircraft. Delta Air Lines has implemented carbon offset programs and investments in cleaner technologies to reduce its environmental impact.
  • When searching for cheap flights, be open to layovers, which can often result in significant savings. Airlines like Copa Airlines and Aeromexico frequently offer connecting flights between Seattle and Buenos Aires, providing more affordable options than non-stop flights. While layovers may extend your travel time, they can be an opportunity to explore an additional city or take a break during your journey.
  • Before booking your flight, review the baggage policies of each airline to avoid any surprises or extra charges. For example, Delta Air Lines allows one free carry-on bag and one personal item, while Alaska Airlines permits a similar policy with specific size and weight restrictions. It's important to note that additional fees may apply for checked bags or oversized items, so familiarize yourself with the baggage allowances of each airline to plan accordingly and minimize any additional costs.

Reviews of the top 5 airlines serving from Seattle to Buenos Aires

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Buenos Aires. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Buenos Aires? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 7980 reviews
7.9Comfort
8.2Boarding
8.5Crew
7.9Entertainment
7.3Food
Airline reviews

Delayed and took off even later than the scheduled delay time

8.0 ExcellentAnonymous, Jul 2025DTW - SEA
Read more Delta reviews

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

I never got this flight. You sent me to Chile!!! And from Chile I got the other flight to São Paulo... I've arrived 7h latter than I was supposed to arrive because of Delta delays.

Because the flight was late, we lost the connection to Brazil. You, Delta delayed, and you Delta anticipated the door closing in 15 min from Miami to GRU. Why? It caused a lot of stress! I almost could not see my mother in law alive because of your delay.

Lost ,y connection due to a mechanical delay, huge line to get new connection and vouchers

Boarding was done by woman who insisted on strict standing in line policy; food was ok; entertainment minimal

Wider seats, better seat cushions, (I felt like there was a board I was sitting on). I had the chicken to eat but It neither tasted nor looked like chicken. The fruit was good.

I was in the last row and they sent me to check in my luggage last minute after boarding. I had to go through the crowd.

We didn’t have any entertainment. I tried to go online without success. The airplane was extremely cold and they didn’t have blankets.

It was good, however the airplane was really cold. We received snacks and the crew was friendly.

Delta has an outstanding service. They are courteous and punctual most of the time. The flight departed a half hour late but we arrived 15 minutes early.

Change of gate in Santiago devolved into half plus hour delay and a really tight connection in Lima

the food served was an embarrassment. No connection for charging the cellphone... What a crappy airline.

Great experience with a crew always thinking in the passenger

The flighr attandants were very rude they ignored me didnt offer me anything to drink throughoit the 4 hour flight i feel i was targeted and ignored because i was a darkskin latino man.

I selected first class expecting excetional service. It was mediocre at best. The food service was cold, meal choices was poor and on one leg they did provide dessert. I did enjoy the lay day seat but the movies were old and nothing current. Boarding the plane is always hot. So boarding is quite warm until your in the air. I took a small personal air fan. Update the meals and movies.

Very happy with my flight. I would definitely recommend it.

Did upgrade, travel in business it was great (more room I could sleep)

It was ok. However, the food was quite poor since I don't eat pasta.

Placed us in the last rear row of the plane so could not recline seats because of the rear wall, and also made it more of a tight space when the passenger in front reclined their seat. While understand seat assignments, every passenger should be afforded a reclining seat. The odor control scent from the restrooms was overwhelming strong. My wife and I could not deal with it, and she suffered a terrible headache as a result. I kept getting hit by the crew since I was on the ilse seat. No apologies, nothing. They made me feel like I was supposed to take the beating for a 3 hr flight.

There was no individual at the front check in when I arrived. I waited for at least 15 minutes and walked around asking security/janitors if they could help and they did not have a solution. So I had to take my checked bag through security and they threw away some of my items. I ended up making it to the gate only a few minutes before it closed due to my waiting for an agent at check in.

The flight was delayed twice and I could not speak with anyone at the airport about checking in. The phone number to Copa - the customer service agents were polite. They are just limited at helping because they are not at the airport

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

The plane was broken so we had to change planes.

The flight got delayed 2.5 hrs due to a maintenance issue that cause a domino effect. American should have spare planes for when something like this happens.

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