Flights San José (Alajuela) → Seattle
As of November 2026, economy flights from San José (Alajuela) to Seattle have a typical range USD 341–2234, median USD 529. Full range across all 110 offers: USD 275–4567. We analyzed 110 offers from 10 airlines in a single price check.
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: San José (Alajuela) → Seattle
Based on 110 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: San José (Alajuela) → Seattle
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| American Airlines | Included | USD 35 | — |
| American | — | USD 1 | — |
| United Airlines | — | — | — |
| Avianca | Included | USD 30 | — |
| United | — | USD 1 | — |
| Copa Airlines | Included | Included | — |
| Air Canada | — | — | — |
| Delta | Included | USD 35 | — |
| Lufthansa | 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 San José (Alajuela) to Seattle cost?
Based on 110 offers · November 2026
San José (Alajuela) to Seattle flights ranged from USD 275 to USD 4567 across 110 offers analyzed in November 2026. The chart below shows how prices distributed across all 110 offers.
These 110 offers (November 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 418 and USD 848
What hidden fees do San José (Alajuela) to Seattle flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on San José (Alajuela) to Seattle routes. The breakdown below is based on 110 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| AA | 45 | 4% |
| American | 1 | 0% |
| UA | 10 | 1% |
| AV | 29 | 3% |
| United | 1 | 0% |
| CM | 26 | 5% |
| AC | 22 | 3% |
| DL | 29 | 2% |
| LH | 10 | 1% |
| BA | 48 | 1% |
American Airlines: base ~USD 458 + fees USD 45 = ~USD 503 total. United Airlines: base ~USD 512 + fees USD 10 = ~USD 522 total.
American Airlines's USD 45 ancillary fees narrow the gap with United Airlines's lower-fee model — the USD 54 base difference shrinks to USD 19 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.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from San José (Alajuela) to Seattle?
10 airlines flew San José (Alajuela) to Seattle in this dataset. 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 (American), fares ranged USD 341–346 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) |
|---|---|---|---|---|
 American | 17 | 341–346 | 341 | 1 (0%) |
 United | 7 | 390–439 | 420 | 1 (0%) |
 Copa Airlines | 7 | 455–707 | 455 | 26 (6%) |
 American Airlines | 16 | 283–2753 | 503 | 45 (9%) |
 United Airlines | 10 | 408–2091 | 522 | 10 (2%) |
 Delta Air Lines | 7 | 577–3260 | 616 | 29 (5%) |
 Air Canada | 9 | 540–1013 | 703 | 22 (3%) |
 Avianca | 34 | 447–2229 | 734 | 29 (4%) |
 Lufthansa | 1 | — | 1660 | 10 (1%) |
 British Airways | 2 | 4359–4360 | 4360 | 48 (1%) |
Where do the best San José (Alajuela) → Seattle prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from travel agency 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: San José (Alajuela) to Seattle flights
- San José (Alajuela)–Seattle had 110 offers analyzed. Median price: USD 529.
- BA charges 47.5x more in ancillary fees than United — USD 48 vs USD 1 avg per booking.
- The same route priced USD 315 apart depending on where it was booked — the lowest median was USD 341. 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 San José (Alajuela) to Seattle cost?
- Based on 110 offers analyzed, San José (Alajuela) to Seattle flights range from USD 275 to USD 4567, with a median price of USD 529. Search for your specific dates →
- What hidden fees should I expect on San José (Alajuela) to Seattle flights?
- On average, ancillary fees (bags, seat selection) add USD 27 to the base fare on San José (Alajuela) to Seattle flights. See itemized fees for your itinerary →
- Which airline is cheapest on San José (Alajuela) to Seattle including all fees?
- American has the lowest median fare on San José (Alajuela) to Seattle at USD 341 (median across 17 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest San José (Alajuela)–Seattle 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 341. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on San José (Alajuela) to Seattle routes?
- San José (Alajuela) to Seattle has 10 airlines competing, creating a price range from USD 275 to USD 4567 across 110 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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