Cheapest one-way flights from Seattle to Frankfurt in September from 271€

AirHint found the following cheapest one-way flights from Seattle (SEA) to Frankfurt (FRA) in September 2025 (see full year).

One-Way flights

14 Sep Alaska Airlines
06 Sep Frontier Airlines
22 Sep Frontier Airlines
18 Sep Condor
03 Sep Alaska Airlines
08 Sep Alaska Airlines
11 Sep Hawaiian Airlines
05 Sep Condor direct
17 Sep Condor
25 Sep Condor

Also check the deals for return flights from Seattle to Frankfurt in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt

Feel free to contact us with any feedback or request another flight research.