Flights Charleston → Seattle
As of May 2026, economy flights from Charleston to Seattle have a typical range USD 454–1102, median USD 559. Full range across all 90 offers: USD 352–2068. We analyzed 90 offers from 6 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 →
How much do flights from Charleston to Seattle cost?
Based on 90 offers · May 2026
Charleston to Seattle flights ranged from USD 352 to USD 2068 across 90 offers analyzed in May 2026. The chart below shows how prices distributed across all 90 offers.
These 90 offers (May 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 470 and USD 811
What hidden fees do Charleston to Seattle flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Charleston to Seattle routes. The breakdown below is based on 90 offers analyzed in May 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| AA | 45 | 9% |
| AS | 136 | 15% |
| WN | 0 | 0% |
| UA | 76 | 8% |
| MX | 418 | 53% |
| G4 | 473 | 62% |
Allegiant Air: base ~USD 281 + fees USD 473 = ~USD 754 total. United Airlines: base ~USD 804 + fees USD 76 = ~USD 880 total.
Allegiant Air's USD 473 ancillary fees narrow the gap with United Airlines's lower-fee model — the USD 523 base difference shrinks to USD 126 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 Charleston to Seattle?
6 airlines flew Charleston 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.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 American Airlines | 24 | — | 470 | 45 (10%) |
 Southwest Airlines | 17 | — | 514 | 0 (0%) |
 Allegiant Air | 5 | — | 754 | 473 (63%) |
 Breeze Airways | 13 | — | 786 | 418 (53%) |
 Alaska Airlines | 3 | — | 824 | 136 (17%) |
 United Airlines | 28 | — | 880 | 76 (9%) |
Where do the best Charleston → Seattle 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: Charleston to Seattle flights
- Full-service carriers on Charleston–Seattle cost 1.2x more than budget airlines (USD 740 vs USD 634 median; overall median USD 559).
- G4 charges 10.5x more in ancillary fees than AA — USD 473 vs USD 45 avg per booking.
- The same route priced USD 340 apart depending on where it was booked — the lowest median was USD 486. 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 Charleston to Seattle cost?
- Based on 90 offers analyzed, Charleston to Seattle flights range from USD 352 to USD 2068, with a median price of USD 559. Search for your specific dates →
- What hidden fees should I expect on Charleston to Seattle flights?
- On average, ancillary fees (bags, seat selection) add USD 127 to the base fare on Charleston to Seattle flights. See itemized fees for your itinerary →
- Which airline is cheapest on Charleston to Seattle including all fees?
- American Airlines has the lowest median fare on Charleston to Seattle at USD 470 (median across 24 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Charleston–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 486. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Charleston to Seattle routes?
- Charleston to Seattle has 6 airlines competing, creating a price range from USD 352 to USD 2068 across 90 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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