Flights Portland → Seattle
As of October 2026, economy flights from Portland to Seattle have a typical range USD 149–496, median USD 262. Full range across all 94 offers: USD 148–1111. We analyzed 94 offers from 7 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: Portland → Seattle
Based on 94 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Portland → Seattle
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Delta | Included | USD 35 | — |
| Alaska Airlines | — | USD 35 | — |
| Alaska | — | USD 45 | — |
| United | — | USD 50 | — |
| Southwest Airlines | Included | Included | — |
| Frontier | — | — | — |
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 Portland to Seattle cost?
Based on 94 offers · October 2026
Portland to Seattle flights ranged from USD 148 to USD 1111 across 94 offers analyzed in October 2026. The chart below shows how prices distributed across all 94 offers.
These 94 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 219 and USD 288
What hidden fees do Portland to Seattle flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Portland to Seattle routes. The breakdown below is based on 94 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| DL | 28 | 15% |
| AS | 29 | 10% |
| Alaska | 45 | 22% |
| United | 50 | 23% |
| WN | 0 | 0% |
| F9 | 10 | 1% |
United: base ~USD 166 + fees USD 50 = ~USD 216 total. Frontier Airlines: base ~USD 1101 + fees USD 10 = ~USD 1111 total.
United's USD 50 ancillary fees narrow the gap with Frontier Airlines's lower-fee model — the USD 935 base difference shrinks to USD 895 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 Portland to Seattle?
7 airlines flew Portland 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 (Delta Air Lines), fares ranged USD 148–224 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) |
|---|---|---|---|---|
 Delta Air Lines | 8 | 148–224 | 186 | 28 (15%) |
 Alaska | 4 | 195–207 | 204 | 45 (22%) |
 United | 2 | — | 216 | 50 (23%) |
 Alaska Airlines | 72 | 149–502 | 267 | 29 (11%) |
 Southwest | 1 | — | 272 | n/a |
 Southwest Airlines | 6 | 266–394 | 341 | 0 (0%) |
 Frontier Airlines | 1 | — | 1111 | 10 (1%) |
Where do the best Portland → 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: Portland to Seattle flights
- Full-service carriers on Portland–Seattle cost 0.4x more than budget airlines (USD 218 vs USD 575 median; overall median USD 262).
- United charges 5.0x more in ancillary fees than F9 — USD 50 vs USD 10 avg per booking.
- The same route priced USD 67 apart depending on where it was booked — the lowest median was USD 207. 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 Portland to Seattle cost?
- Based on 94 offers analyzed, Portland to Seattle flights range from USD 148 to USD 1111, with a median price of USD 262. Search for your specific dates →
- What hidden fees should I expect on Portland to Seattle flights?
- On average, ancillary fees (bags, seat selection) add USD 28 to the base fare on Portland to Seattle flights. See itemized fees for your itinerary →
- Which airline is cheapest on Portland to Seattle including all fees?
- Delta Air Lines has the lowest median fare on Portland to Seattle at USD 186 (median across 8 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Portland–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 207. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Portland to Seattle routes?
- Portland to Seattle has 7 airlines competing, creating a price range from USD 148 to USD 1111 across 94 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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