Cheap Flights from Porto to Washington, D.C.
No deal from Porto to Washington, D.C. has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Porto to Washington, D.C., the lowest round-trip fare we recorded was $576, in July. The typical fare was $652. July was the cheapest month we saw and September the dearest.
The most recent price we saw on this route was $659 on Tap Air Portugal, seen Oct 15. It is an unverified observation and may have changed.
See every deal <a href="/from/porto">from Porto</a>, <a href="/to/washington-dc">to Washington, D.C.</a>, or the return direction <a href="/from/washington-dc/to/porto">Washington, D.C. to Porto</a>.
Latest price we saw: Porto to Washington, D.C.
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Porto (OPO) to Washington, D.C. (IAD) | $659 | 9.3¢ | Nov 19 – Nov 25 | Tap Air Portugal | Oct 15 | Check price |
Price history: Porto to Washington, D.C.
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $658 | $659 | 3 |
| Sep 2026 | $765 | $771 | 2 |
| Aug 2026 | $594 | $603 | 7 |
| Jul 2026 | $576 | $576 | 1 |
Frequently asked questions
How many flight deals from Porto to Washington, D.C. are on Sparkflights right now?
There are 0 verified deals from Porto to Washington, D.C. on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Porto to Washington, D.C.?
The lowest fare we've recorded from Porto to Washington, D.C. is $576, based on 13 price observations over 4 months.
How much does a flight from Porto to Washington, D.C. cost?
The typical round-trip fare we observed from Porto to Washington, D.C. is $652, against a recorded low of $576. These are observations, not quotes.
When is the cheapest month to fly Porto to Washington, D.C.?
July was the cheapest month we observed from Porto to Washington, D.C. and September the dearest, over 4 months of data.
What is the current price from Porto to Washington, D.C.?
The most recent fare our sweep saw from Porto to Washington, D.C. is $659, on Oct 15. It is an unverified observation rather than a verified deal, so check it before booking.