Cheap Flights from Seattle to Philadelphia
No deal from Seattle to Philadelphia has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Seattle to Philadelphia, the lowest round-trip fare we recorded was $193, in October. The typical fare was $292. October was the cheapest month we saw and September the dearest.
The most recent price we saw on this route was $405 on Frontier and Southwest, seen Oct 17. It is an unverified observation and may have changed.
See every deal <a href="/from/seattle">from Seattle</a>, <a href="/to/philadelphia">to Philadelphia</a>, or the return direction <a href="/from/philadelphia/to/seattle">Philadelphia to Seattle</a>.
Latest price we saw: Seattle to Philadelphia
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 |
|---|---|---|---|---|---|---|
| Seattle (SEA) to Philadelphia (PHL) | $405 | 8.5¢ | Nov 15 – Nov 23 | Frontier and Southwest | Oct 17 | Check price |
Price history: Seattle to Philadelphia
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $193 | $295 | 47 |
| Sep 2026 | $271 | $337 | 34 |
| Aug 2026 | $228 | $307 | 97 |
| Jul 2026 | $228 | $228 | 1 |
Frequently asked questions
How many flight deals from Seattle to Philadelphia are on Sparkflights right now?
There are 0 verified deals from Seattle to Philadelphia on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Seattle to Philadelphia?
The lowest fare we've recorded from Seattle to Philadelphia is $193, based on 179 price observations over 4 months.
How much does a flight from Seattle to Philadelphia cost?
The typical round-trip fare we observed from Seattle to Philadelphia is $292, against a recorded low of $193. These are observations, not quotes.
When is the cheapest month to fly Seattle to Philadelphia?
October was the cheapest month we observed from Seattle to Philadelphia and September the dearest, over 4 months of data.
What is the current price from Seattle to Philadelphia?
The most recent fare our sweep saw from Seattle to Philadelphia is $405, on Oct 17. It is an unverified observation rather than a verified deal, so check it before booking.