Flights Detroit → Seattle
As of September 2026, economy flights from Detroit to Seattle have a typical range USD 681–2287, median USD 1457. Full range across all 28 offers: USD 565–2752. We found 14% of 28 offers from budget carriers (around USD 1112) and 86% from full-service carriers (around USD 1647).
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: Detroit → Seattle
Based on 28 offers · September 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Detroit → Seattle
Add-on pricing from the cheapest available offer per airline · September 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Delta | Included | USD 35 | — |
| Alaska Airlines | Included | USD 35 | — |
| American Airlines | 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 Detroit to Seattle cost?
Based on 28 offers · September 2026
Detroit to Seattle flights ranged from USD 565 to USD 2752 across 28 offers analyzed in September 2026. Two fare clusters detected: budget fares around 893 and premium fares around 1987 The chart below shows how prices distributed across all 28 offers.
What hidden fees do Detroit to Seattle flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Detroit to Seattle routes. The breakdown below is based on 28 offers analyzed in September 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| DL | 28 | 2% |
| AS | 28 | 3% |
| AA | 45 | 4% |
American Airlines: base ~USD 1067 + fees USD 45 = ~USD 1112 total. Delta Air Lines: base ~USD 1619 + fees USD 28 = ~USD 1647 total.
American Airlines's USD 45 ancillary fees narrow the gap with Delta Air Lines's lower-fee model — the USD 552 base difference shrinks to USD 535 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 Detroit to Seattle?
4 airlines flew Detroit to Seattle 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.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 UA|WN | 1 | — | 565 | n/a |
 Alaska Airlines | 2 | 798–1175 | 986 | 28 (3%) |
 American Airlines | 1 | — | 1112 | 45 (4%) |
 Delta Air Lines | 24 | 774–2552 | 1647 | 28 (2%) |
Where do the best Detroit → 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: Detroit to Seattle flights
- Detroit–Seattle had 28 offers analyzed. Median price: USD 1457.
- AA charges 1.6x more in ancillary fees than AS — USD 45 vs USD 28 avg per booking.
- The same route priced USD 1522 apart depending on where it was booked — the lowest median was USD 565. 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 Detroit to Seattle cost?
- Based on 28 offers analyzed, Detroit to Seattle flights range from USD 565 to USD 2752, with a median price of USD 1457. Search for your specific dates →
- What hidden fees should I expect on Detroit to Seattle flights?
- On average, ancillary fees (bags, seat selection) add USD 28 to the base fare on Detroit to Seattle flights. See itemized fees for your itinerary →
- Which airline is cheapest on Detroit to Seattle including all fees?
- UA|WN has the lowest median fare on Detroit to Seattle at USD 565 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Detroit–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 565. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Detroit to Seattle routes?
- Detroit to Seattle has 4 airlines competing, creating a price range from USD 565 to USD 2752 across 28 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
4 airlines, two price clusters — find which fits your budget
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