Flights Seattle → Key West
As of November 2026, economy flights from Seattle to Key West have a typical range USD 1420–5606, median USD 1822. Full range across all 135 offers: USD 1188–8883. We found 24% of 135 offers from budget carriers (around USD 1562) and 76% from full-service carriers (around USD 1822).
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 → Key West
Based on 135 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Seattle → Key West
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| American | — | USD 100 | — |
| United Airlines | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| United | — | USD 100 | — |
| Delta | Included | USD 35 | — |
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 Key West cost?
Based on 135 offers · November 2026
Seattle to Key West flights ranged from USD 1188 to USD 8883 across 135 offers analyzed in November 2026. Two fare clusters detected: budget fares around 1573 and premium fares around 5420 The chart below shows how prices distributed across all 135 offers.
These 135 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 1602 and USD 2105
What hidden fees do Seattle to Key West flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Seattle to Key West routes. The breakdown below is based on 135 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| American | 100 | 7% |
| UA | 43 | 2% |
| AA | 45 | 2% |
| United | 100 | 7% |
| DL | 29 | 0% |
American: base ~USD 1396 + fees USD 100 = ~USD 1496 total. Delta Air Lines: base ~USD 5577 + fees USD 29 = ~USD 5606 total.
American's USD 100 ancillary fees narrow the gap with Delta Air Lines's lower-fee model — the USD 4181 base difference shrinks to USD 4110 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.American charges 3.4x more in ancillary fees than DL 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 Key West?
5 airlines flew Seattle to Key West 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 (American), fares ranged USD 1290–1608 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 | 12 | 1290–1608 | 1496 | 100 (7%) |
 United Airlines | 15 | 1310–2410 | 1507 | 43 (3%) |
 United | 5 | 1391–1591 | 1562 | 100 (6%) |
 American Airlines | 81 | 1585–2089 | 1822 | 45 (2%) |
 Delta Air Lines | 22 | 5589–8873 | 5606 | 29 (1%) |
Where do the best Seattle → Key West 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 Key West flights
- Seattle–Key West had 135 offers analyzed. Median price: USD 1822.
- American charges 3.4x more in ancillary fees than DL — USD 100 vs USD 29 avg per booking.
- The same route priced USD 7413 apart depending on where it was booked — the lowest median was USD 1416. 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 Key West cost?
- Based on 135 offers analyzed, Seattle to Key West flights range from USD 1188 to USD 8883, with a median price of USD 1822. Search for your specific dates →
- What hidden fees should I expect on Seattle to Key West flights?
- On average, ancillary fees (bags, seat selection) add USD 49 to the base fare on Seattle to Key West flights. See itemized fees for your itinerary →
- Which airline is cheapest on Seattle to Key West including all fees?
- American has the lowest median fare on Seattle to Key West at USD 1496 (median across 12 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Seattle–Key West 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 1416. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Seattle to Key West routes?
- Seattle to Key West has 5 airlines competing, creating a price range from USD 1188 to USD 8883 across 135 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
5 airlines, two price clusters — find which fits your budget
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