Flights Seattle → San Jose
As of October 2026, economy flights from Seattle to San Jose have a typical range USD 403–618, median USD 404. Full range across all 61 offers: USD 346–1197. We analyzed 61 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: Seattle → San Jose
Based on 61 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Seattle → San Jose
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| American Airlines | Included | USD 35 | — |
| Southwest Airlines | Included | Included | — |
| Delta | Included | USD 35 | — |
| Alaska | — | USD 45 | — |
| Southwest | — | USD 45 | — |
| Delta | — | USD 45 | — |
| Alaska 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 Seattle to San Jose cost?
Based on 61 offers · October 2026
Seattle to San Jose flights ranged from USD 346 to USD 1197 across 61 offers analyzed in October 2026. The chart below shows how prices distributed across all 61 offers.
These 61 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 403 and USD 430
What hidden fees do Seattle to San Jose flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Seattle to San Jose routes. The breakdown below is based on 61 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| AA | 47 | 6% |
| WN | 0 | 0% |
| DL | 45 | 10% |
| Alaska | 45 | 11% |
| Southwest | 45 | 11% |
| Delta | 45 | 11% |
| AS | 45 | 10% |
Delta Air Lines: base ~USD 358 + fees USD 45 = ~USD 403 total. Alaska: base ~USD 359 + fees USD 45 = ~USD 404 total.
Total costs diverge further when fees are added on this route. 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 Seattle to San Jose?
7 airlines flew Seattle to San Jose 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 394–609 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 | 12 | 394–609 | 403 | 45 (11%) |
 Alaska | 6 | 404–437 | 404 | 45 (11%) |
 Southwest | 4 | — | 404 | 45 (11%) |
 Delta | 4 | — | 404 | 45 (11%) |
 Southwest Airlines | 19 | 393–409 | 409 | 0 (0%) |
 Alaska Airlines | 8 | 429–526 | 430 | 45 (10%) |
 American Airlines | 8 | 386–1193 | 697 | 47 (7%) |
Where do the best Seattle → San Jose 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: Seattle to San Jose flights
- Full-service carriers on Seattle–San Jose cost 1.2x more than budget airlines (USD 468 vs USD 406 median; overall median USD 404).
- AA charges 1.0x more in ancillary fees than AS — USD 47 vs USD 45 avg per booking.
- The same route priced USD 5 apart depending on where it was booked — the lowest median was USD 404. 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 San Jose cost?
- Based on 61 offers analyzed, Seattle to San Jose flights range from USD 346 to USD 1197, with a median price of USD 404. Search for your specific dates →
- What hidden fees should I expect on Seattle to San Jose flights?
- On average, ancillary fees (bags, seat selection) add USD 31 to the base fare on Seattle to San Jose flights. See itemized fees for your itinerary →
- Which airline is cheapest on Seattle to San Jose including all fees?
- Delta Air Lines has the lowest median fare on Seattle to San Jose at USD 403 (median across 12 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Seattle–San Jose 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 404. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Seattle to San Jose routes?
- Seattle to San Jose has 7 airlines competing, creating a price range from USD 346 to USD 1197 across 61 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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