$403+ Cheap flights from Seattle (SEA) to Buenos Aires (BUE)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Buenos Aires with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Buenos Aires
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Cheapest flights from Seattle to Buenos AiresExplore the most affordable flight options available from Seattle to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 12, 2026.
Explore the most affordable flight options available from Seattle to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 12, 2026.
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/610:10 am -
3 stops32h 55m
Mon 12/149:15 pm -
2 stops28h 44m
Deal found 9/8![Multiple Airlines logo]()
$1,050
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/297:05 pm -
3 stops33h 27m
Tue 12/811:00 am -
3 stops32h 37m
Deal found 9/9![Multiple Airlines logo]()
$1,090
This Kissandfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:45 pm -
3 stops49h 15m
Tue 10/201:10 pm -
1 stop36h 49m
Deal found 9/8![Multiple Airlines logo]()
$1,105
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:40 am -
3 stops35h 25m
Sun 11/18:40 am -
3 stops34h 57m
Deal found 9/10![Multiple Airlines logo]()
$1,127
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/169:30 am -
1 stop31h 20m
Tue 11/2411:55 pm -
1 stop25h 00m
Deal found 9/9![Aeromexico logo]()
$1,131
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/299:30 am -
1 stop31h 20m
Tue 12/811:55 pm -
1 stop25h 00m
Deal found 9/9![Aeromexico logo]()
$1,140
This eDestinos deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:32 pm -
2 stops31h 51m
Thu 10/297:45 am -
2 stops42h 14m
Deal found 9/7![Multiple Airlines logo]()
$1,141
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:05 pm -
3 stops26h 55m
Sat 12/1211:25 pm -
2 stops26h 34m
Deal found 9/8![Multiple Airlines logo]()
$1,165
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:44 pm -
2 stops25h 26m
Mon 12/712:00 pm -
1 stop36h 55m
Deal found 9/9![Multiple Airlines logo]()
$1,179
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/297:05 pm -
3 stops29h 00m
Tue 12/85:35 pm -
3 stops30h 33m
Deal found 9/9![Multiple Airlines logo]()
$1,269
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/68:15 am -
3 stops31h 25m
Mon 12/1411:50 am -
3 stops30h 50m
Deal found 9/8![Multiple Airlines logo]()
$1,272
This Booking.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:45 am -
2 stops28h 55m
Sat 12/123:40 pm -
2 stops34h 19m
Deal found 9/8![Multiple Airlines logo]()
$1,352
Best flights from Seattle to Buenos AiresDiscover carefully curated flight deals from Seattle to Buenos Aires that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 12, 2026.
Discover carefully curated flight deals from Seattle to Buenos Aires that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 12, 2026.
This FlightHub deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/108:10 am -
1 stop20h 40m
Tue 12/2212:20 pm -
1 stop28h 02m
Deal found 9/7![Multiple Airlines logo]()
$1,388
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/177:03 am -
1 stop21h 17m
Mon 3/111:55 pm -
1 stop17h 50m
Deal found 9/8![United Airlines logo]()
$1,428
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/72:30 pm -
2 stops31h 30m
Wed 1/207:20 am -
2 stops21h 49m
Deal found 9/9![Delta logo]()
$1,428
This Copa Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:39 pm -
2 stops27h 13m
Wed 12/163:40 am -
2 stops23h 19m
Deal found 9/11![Copa Airlines logo]()
$1,450
This Cheapflightsfares deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/105:40 pm -
2 stops19h 50m
Tue 12/225:35 pm -
2 stops27h 16m
Deal found 9/7![LATAM Airlines logo]()
$1,458
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/122:30 pm -
2 stops23h 00m
Mon 1/258:05 pm -
2 stops21h 55m
Deal found 9/7![Delta logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/146:29 am -
2 stops21h 51m
Thu 1/2810:05 pm -
2 stops25h 04m
Deal found 9/7![United Airlines logo]()
$1,432
This Copa Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:16 pm -
2 stops27h 52m
Mon 11/302:33 pm -
2 stops37h 40m
Deal found 9/7![Copa Airlines logo]()
$1,450
This SmartFares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/242:10 pm -
2 stops20h 50m
Wed 3/35:35 pm -
2 stops24h 05m
Deal found 9/8![Multiple Airlines logo]()
$1,457
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/187:20 am -
2 stops23h 40m
Mon 3/18:05 pm -
2 stops21h 55m
Deal found 9/8![Delta logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/127:03 am -
1 stop19h 17m
Mon 1/2511:55 pm -
1 stop17h 50m
Deal found 9/11![United Airlines logo]()
$1,448
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/71:30 pm -
2 stops24h 00m
Wed 1/208:05 pm -
2 stops23h 42m
Deal found 9/9![Delta logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/53:51 pm -
2 stops34h 29m
Mon 1/1811:55 pm -
3 stops28h 36m
Deal found 9/12![United Airlines logo]()
$1,472
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/1512:00 pm -
2 stops23h 00m
Tue 3/28:05 pm -
2 stops23h 42m
Deal found 9/8![Delta logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/74:30 pm -
2 stops33h 50m
Sat 2/2010:05 pm -
2 stops23h 09m
Deal found 9/9![United Airlines logo]()
$1,492
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/112:30 pm -
2 stops20h 30m
Wed 1/278:05 pm -
2 stops23h 42m
Deal found 9/7![Delta logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:31 am -
2 stops19h 49m
Wed 1/1311:55 pm -
2 stops27h 01m
Deal found 9/11![United Airlines logo]()
$1,502
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/182:30 pm -
2 stops20h 30m
Thu 3/43:50 pm -
2 stops26h 10m
Deal found 9/8![Delta logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/311:44 pm -
2 stops26h 36m
Fri 1/1510:05 pm -
2 stops21h 28m
Deal found 9/9![United Airlines logo]()
$1,502
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/112:30 pm -
2 stops20h 30m
Tue 1/268:05 pm -
2 stops23h 42m
Deal found 9/7![Delta logo]()
$1,428
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1612:00 pm -
2 stops23h 00m
Mon 3/18:05 pm -
2 stops21h 55m
Deal found 9/8![Delta logo]()
$1,428
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:00 am -
2 stops20h 40m
Wed 11/255:35 pm -
2 stops23h 51m
Deal found 9/10![Delta logo]()
$1,448
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/298:00 am -
1 stop20h 40m
Thu 1/1411:35 pm -
1 stop39h 51m
Deal found 9/11![Delta logo]()
$1,488
Last-minute flights from Seattle to Buenos AiresDiscover last-minute flight deals from Seattle to Buenos Aires. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Buenos Aires. Data last updated September 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/154:27 pm -
2 stops56h 03m
Sun 11/222:40 pm -
1 stop25h 43m
Deal found 9/10![Multiple Airlines logo]()
$1,277
This Kissandfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:45 pm -
3 stops49h 15m
Tue 10/201:10 pm -
1 stop36h 49m
Deal found 9/8![Multiple Airlines logo]()
$1,105
This flugladen.de deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:30 am -
1 stop31h 55m
Tue 10/2011:25 pm -
1 stop24h 30m
Deal found 9/8![Aeromexico logo]()
$1,202
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/511:00 pm -
3 stops35h 00m
Sat 10/245:35 pm -
3 stops43h 52m
Deal found 9/8![Multiple Airlines logo]()
$1,470
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:00 pm -
3 stops30h 16m
Thu 10/151:10 pm -
3 stops34h 49m
Deal found 9/8![Multiple Airlines logo]()
$1,183
This eDestinos deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:32 pm -
2 stops31h 51m
Thu 10/297:45 am -
2 stops42h 14m
Deal found 9/7![Multiple Airlines logo]()
$1,141
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:40 am -
3 stops35h 25m
Sun 11/18:40 am -
3 stops34h 57m
Deal found 9/10![Multiple Airlines logo]()
$1,127
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:10 am -
3 stops35h 15m
Tue 11/1011:20 am -
3 stops36h 02m
Deal found 9/8![Multiple Airlines logo]()
$1,273
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:05 pm -
3 stops33h 25m
Tue 11/1012:50 pm -
3 stops38h 07m
Deal found 9/8![Multiple Airlines logo]()
$1,433
This FlightHub deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:54 am -
2 stops40h 46m
Wed 11/47:05 am -
2 stops43h 39m
Deal found 9/12![Multiple Airlines logo]()
$1,476
This LATAM Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:40 pm -
2 stops24h 50m
Wed 11/119:45 pm -
2 stops29h 07m
Deal found 9/11![LATAM Airlines logo]()
$1,518
This FlightHub deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:45 am -
2 stops26h 45m
Wed 11/113:50 pm -
2 stops26h 08m
Deal found 9/9![Multiple Airlines logo]()
$1,551
One-way flights from Seattle to Buenos AiresSearch for one-way flight options from Seattle to Buenos Aires. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
Search for one-way flight options from Seattle to Buenos Aires. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/78:00 pm -
2 stops39h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:09 pm -
3 stops32h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/78:00 pm -
2 stops32h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$418
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:08 am -
2 stops43h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:08 am -
2 stops43h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:27 pm -
3 stops46h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$454
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:27 pm -
3 stops43h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$454
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/64:27 pm -
3 stops48h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$457
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:54 pm -
3 stops45h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$460
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:00 pm -
2 stops32h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:09 pm -
3 stops41h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$467
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/19:07 pm -
2 stops30h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$469
Find flight deals from Seattle to Buenos Aires
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Buenos Aires (BUE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 12, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $1,050 (Mytrip) |
One-way from | $403 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,347 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Buenos Aires that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 12, 2026.
Use the filters below to find and compare flights from Seattle to Buenos Aires that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery
SEAAEP
Seattle/Tacoma Intl
Thu 10/29
9:27 pm-8:58 pm
3 stops43h 31m
Buenos Aires Jorge Newbery
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$454
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery
SEAAEP
Seattle/Tacoma Intl
Tue 12/1
9:07 pm-8:30 am
2 stops30h 23m
Buenos Aires Jorge Newbery
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$469
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery
SEAAEP
Seattle/Tacoma Intl
Tue 2/23
8:05 am-7:30 am
2 stops42h 25m
Buenos Aires Jorge Newbery
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$473
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery
SEAAEP
Seattle/Tacoma Intl
Wed 10/28
8:08 am-8:05 am
3 stops43h 57m
Buenos Aires Jorge Newbery
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$473
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - EZE Buenos Aires Ministro Pistarini
SEAEZE
Seattle/Tacoma Intl
Wed 12/9
7:59 pm-5:05 am
3 stops52h 06m
Buenos Aires Ministro Pistarini
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$486
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery
SEAAEP
Seattle/Tacoma Intl
Thu 11/26
1:52 pm-4:00 pm
3 stops45h 08m
Buenos Aires Jorge Newbery
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$494
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - EZE Buenos Aires Ministro Pistarini
SEAEZE
Seattle/Tacoma Intl
Thu 3/4
9:07 pm-6:35 am
3 stops28h 28m
Buenos Aires Ministro Pistarini
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$502
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - EZE Buenos Aires Ministro Pistarini
SEAEZE
Seattle/Tacoma Intl
Tue 1/19
9:30 am-9:50 pm
1 stop31h 20m
Buenos Aires Ministro Pistarini
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$519
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - EZE Buenos Aires Ministro Pistarini
SEAEZE
Seattle/Tacoma Intl
Wed 12/30
9:26 pm-3:45 am
2 stops25h 19m
Buenos Aires Ministro Pistarini
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$519
SeattleBuenos Aires
SEA Seattle/Tacoma Intl - EZE Buenos Aires Ministro Pistarini
SEAEZE
Seattle/Tacoma Intl
Tue 12/29
9:26 pm-9:32 am
2 stops31h 06m
Buenos Aires Ministro Pistarini
Wed 12/31
12:00 am-7:00 pm
Nonstop0h 00m
$519
Showing 1-10 of 40 resultsSorted by cheapest first
Compare providers for flights from Seattle to Buenos Aires
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Buenos Aires in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Buenos Aires flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-Buenos Aires flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Seattle-Buenos Aires flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Buenos Aires flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Buenos Aires
Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Seattle with our price prediction graph.
SEA-BUE
SEA-AEP
SEA-EZE
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Buenos Aires
SEA-BUE
SEA-AEP
SEA-EZE
What is the cheapest month to book a flight from Seattle to Buenos Aires?
Currently, March is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $1,205). Flying from Seattle to Buenos Aires in December is currently the most expensive (average of $1,766). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Seattle to Buenos Aires?
Airfare is below average for this route at the moment.
Seattle to Buenos Aires flights typically cost between $1,238 and $1,607 in December.The cheapest round-trip price found within the last 5 days was $1,050 on Multiple Airlines (Dec 6-Dec 14).
How far ahead should I book a flight from Seattle to Buenos Aires?
Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Buenos Aires. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Buenos Aires
Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated September 12, 2026.
Read reviews from past customers who have flown Delta,LATAM Airlines, andUnited Airlines from Seattle to Buenos Aires. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Seattle to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Other flights to Buenos Aires
Explore flights to Buenos Aires departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 12, 2026.
Complete your trip
Complete your trip to Buenos Aires by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Buenos Aires by cabin class
Find flights from Seattle to Buenos Aires, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Buenos Aires flights
Browse other Seattle and Buenos Aires flight options. Last updated on September 12, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Seattle to Buenos Aires
Discover the top 3 airlines that operate flights from Seattle to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$159 | Average$1,534 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$696 | Average$1,397 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,126 | Average$1,493 | FlexibilityNo cancel fee | On-time71% |