About this route
Airlines serving both Seattle and Porto include British Airways, Iberia, United Airlines and 2 more. We don't publish an award chart for this city pair yet, so use the search tool below to check live award pricing and availability across every program that flies it.
Airlines serving these airports
These carriers serve both SEA and OPO, non-stop or via a connecting hub.
When award seats open on this route
Booking tips
- Book 6-11 months in advance for the best premium cabin availability
- Compare programs before transferring — prices vary significantly between loyalty currencies
- Check our search tool for real-time Seattle to Porto award availability
Keep planning this trip
Other award routes from Seattle
Frequently asked questions
Which loyalty programs can I use for SEA to OPO?
We don't publish an award chart for SEA–OPO yet, so search the route to see which programs price it and what they charge. Most major programs accept transfers from Amex, Chase and Capital One, so the currency you hold is rarely the constraint — availability is.
Ready to book Seattle to Porto?
Search real-time award availability across every airline on this route.