Flights Seattle → Buenos Aires
As of October 2026, economy flights from Seattle to Buenos Aires have a typical range USD 925–2986, median USD 1140. Full range across all 156 offers: USD 713–4003. We found 30% of 156 offers from budget carriers (around USD 1003) and 70% from full-service carriers (around USD 1140).
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Seattle → Buenos Aires
Based on 156 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Seattle → Buenos Aires
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Air Canada | Included | USD 30 | — |
| Delta | — | USD 35 | — |
| LATAM Airlines | — | USD 40 | — |
| United Airlines | — | USD 35 | — |
| Copa | Included | USD 40 | — |
| American Airlines | — | USD 35 | — |
| Alaska Airlines | Included | USD 35 | — |
| Turkish Airlines | Included | Included | — |
| British Airways | Included | USD 65 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Seattle to Buenos Aires cost?
Based on 156 offers · October 2026
Seattle to Buenos Aires flights ranged from USD 713 to USD 4003 across 156 offers analyzed in October 2026. Two fare clusters detected: budget fares around 877 and premium fares around 3180 The chart below shows how prices distributed across all 156 offers.
These 156 offers (October 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 925 and USD 1498
What hidden fees do Seattle to Buenos Aires flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Seattle to Buenos Aires routes. The breakdown below is based on 156 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| AC | 42 | 5% |
| DL | 38 | 3% |
| LA | 57 | 4% |
| UA | 42 | 3% |
| CM | 55 | 5% |
| AA | 60 | 5% |
| AS | 45 | 3% |
| TK | 10 | 0% |
| BA | 80 | 2% |
American Airlines: base ~USD 1159 + fees USD 60 = ~USD 1219 total. Turkish Airlines: base ~USD 2045 + fees USD 10 = ~USD 2055 total.
American Airlines's USD 60 ancillary fees narrow the gap with Turkish Airlines's lower-fee model — the USD 886 base difference shrinks to USD 836 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.BA charges 8.0x more in ancillary fees than TK on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Seattle to Buenos Aires?
13 airlines flew Seattle to Buenos Aires in this dataset. The route shows a clear split between low-cost and full-service carriers. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (Air Canada), fares ranged USD 713–1043 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Air Canada | 5 | 713–1043 | 804 | 42 (5%) |
 AM | 1 | — | 882 | n/a |
 Delta Air Lines | 32 | 925–2781 | 925 | 38 (4%) |
 United | 1 | — | 925 | n/a |
 American | 2 | 940–968 | 954 | n/a |
 Copa Airlines | 6 | 1003–1055 | 1003 | 55 (5%) |
 LATAM Airlines | 67 | 925–2924 | 1140 | 57 (5%) |
 American Airlines | 12 | 1106–1426 | 1219 | 60 (5%) |
 United Airlines | 12 | 928–3060 | 1352 | 42 (3%) |
 Delta | 14 | 925–3391 | 1353 | n/a |
 Alaska Airlines | 1 | — | 1602 | 45 (3%) |
 Turkish Airlines | 1 | — | 2055 | 10 (0%) |
 British Airways | 2 | 3341–3929 | 3635 | 80 (2%) |
Where do the best Seattle → Buenos Aires prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Seattle to Buenos Aires flights
- Seattle–Buenos Aires had 156 offers analyzed. Median price: USD 1140.
- BA charges 8.0x more in ancillary fees than TK — USD 80 vs USD 10 avg per booking.
- The same route priced USD 475 apart depending on where it was booked — the lowest median was USD 925. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Seattle to Buenos Aires cost?
- Based on 156 offers analyzed, Seattle to Buenos Aires flights range from USD 713 to USD 4003, with a median price of USD 1140. Search for your specific dates →
- What hidden fees should I expect on Seattle to Buenos Aires flights?
- On average, ancillary fees (bags, seat selection) add USD 51 to the base fare on Seattle to Buenos Aires flights. See itemized fees for your itinerary →
- Which airline is cheapest on Seattle to Buenos Aires including all fees?
- Air Canada has the lowest median fare on Seattle to Buenos Aires at USD 804 (median across 5 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Seattle–Buenos Aires flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 925. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Seattle to Buenos Aires routes?
- Seattle to Buenos Aires has 13 airlines competing, creating a price range from USD 713 to USD 4003 across 156 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
13 airlines, two price clusters — find which fits your budget
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