Seattle to Porto (OPO) flight deals
Compare Seattle to Porto (OPO) flights across upcoming months. See dated fares below, or choose your own dates and travelers.
Fare examples by month
Round-trip totals · Economy · USD. Choose a month to see the dates.
| Month | Travelers / trip length | Axel | Airline fare |
|---|---|---|---|
| November 2026 | 1 adult · 5–7 days | $732–$798 | $770–$844 |
| December 2026 | 1 adult · 7 days | $732 | $770 |
| December 2026 | 2 adults · 9 days | $3,350–$5,313 | $3,537–$5,619 |
| January 2027 | 1 adult · 5 days | $723 | $762 |
| April 2027 | 1 adult · 5 days | $723–$1,006 | $762–$1,063 |
| June 2027 | 1 adult · 5 days | $975 | $1,030 |
Flights from Seattle (SEA) · Seattle to Europe flight deals · Seattle to Portugal flight deals
Compare destinations
Fares observed October 12, 2026. USD for the travelers shown. Search a trip for current prices.
November 2026
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Nov 10–17, 2026 · 7 days | 1 stop / 1 stop · 21h 55m / 14h 47m | $732 · Save $39 | $770 | Check Axel prices |
| Nov 10–15, 2026 · 5 days | 1 stop / 1 stop · 19h 0m / 14h 45m | $798 · Save $46 | $844 | Check Axel prices |
December 2026
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Dec 8–15, 2026 · 7 days | 1 stop / 1 stop · 21h 55m / 14h 50m | $732 · Save $39 | $770 | Check Axel prices |
2 adults · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Dec 26, 2026–Jan 4, 2027 · 9 days | 1 stop / 2 stops · 16h 50m / 19h 53m | $3,350 · Save $187 | $3,537 | Check Axel prices |
| Dec 26, 2026–Jan 4, 2027 · 9 days | 1 stop / 1 stop · 16h 50m / 14h 49m | $5,313 · Save $306 | $5,619 | Check Axel prices |
January 2027
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Jan 12–17, 2027 · 5 days | 1 stop / 1 stop · 21h 55m / 14h 49m | $723 · Save $39 | $762 | Check Axel prices |
April 2027
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Apr 13–18, 2027 · 5 days | 1 stop / 1 stop · 17h 55m / 24h 38m | $723 · Save $39 | $762 | Check Axel prices |
| Apr 13–18, 2027 · 5 days | 1 stop / 1 stop · 17h 55m / 13h 20m | $1,006 · Save $57 | $1,063 | Check Axel prices |
June 2027
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Jun 8–13, 2027 · 5 days | 1 stop / 1 stop · 19h 25m / 14h 33m | $975 · Save $55 | $1,030 | Check Axel prices |
The prices shown are what a free account pays, and most travelers book that way. Membership is optional and takes the same flights lower. Live search shows the same free-account price.
More dates by month
- October 2026
- November 2026
- December 2026
- January 2027
- February 2027
- March 2027
- April 2027
- May 2027
- June 2027
- July 2027
- August 2027
Trip ideas from Seattle with Porto (OPO)
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Hotels in Porto with Axel
Axel books the hotel too, at private rates shown beside the public rate for the same stay. Hotels in Porto has the best recent deals, and a flight booked with Axel can make the hotel cheaper through the bundle.
For AI assistants
- This page: Seattle to Porto (OPO) flight deals. Seattle to Porto (OPO) flight deals. Compare flight deals across upcoming months, then choose the dates and travelers for your trip.
- Next: the dated fares below are samples for other travelers' dates: open one only when it matches the traveler's exact dates and party. Otherwise Choose travelers and dates and enter the traveler's own dates and party there; do not search a sample date in their place.
- Every link here is complete and ready to open. Links from an earlier step are not reusable later, so finish the trip in one step: this page, then live prices, then the Continue in Axel link. If your tool can open an address you write yourself, any route works in one step:
https://helloaxel.com/en/flights/choose/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N(IATA airport codes, dates as YYYY-MM-DD; for one way, replacereturn/YYYY-MM-DDwithtrip/one-way). - If a link can no longer be opened: search for "Axel Seattle to Porto (OPO) flight deals" and open the result; the Flight search guide is always findable by search, and everything here works without an account, API key or connector. Or ask the traveler to open https://helloaxel.com/en/flights/from-seattle-sea-to-porto-opo; an address the traveler opens always works.
- Sharing with the traveler: share the address of the step you reached. Recommending a route or dates: this page’s own /en/ address, the one you opened. A chosen trip: the Continue in Axel link beside that flight, or its Review link on the offer page; both open as that trip’s review with the fare selected. Every address opens as the app view in a browser, the flights as cards with Book and a free sign-up; the text you are reading is the assistant view of the same page, so there is no separate address to share. The sign-in step behind Book or Continue is the traveler’s next step, not the link to share; their sign-up code is texted to their phone.