May is the cheapest month to fly this route, with average fares around $735 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $735 | $710 | Best | |
| June 2026 | $862 | $750 | Peak | |
| July 2026 | $825 | $729 | ||
| August 2026 | $850 | $767 |
Departing on Sunday offers the lowest average fares at $798. Friday departures are the most expensive at $878, a difference of $80.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Seattle to Frankfurt is May, with average round-trip fares around $735. The lowest fare found in May is $710.
Sunday departures are the cheapest, averaging $798 round trip. The most expensive day is Friday at $878.
Based on current pricing trends, booking for May travel offers the best value. Avoid June if possible, as fares average $862 compared to $735 in the cheapest month. August is a solid middle-ground option at $850.
Flying in May instead of June can save you approximately $127 per round trip. The cheapest month averages $735 while the most expensive averages $862.
Airlines, flight times, price calendar, and more for Seattle to Frankfurt
View SEA → FRA Details