July is the cheapest month to fly this route, with average fares around $798 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $806 | $709 | ||
| June 2026 | $854 | $709 | Peak | |
| July 2026 | $798 | $715 | Best | |
| August 2026 | $828 | $824 |
Departing on Sunday offers the lowest average fares at $807. Thursday departures are the most expensive at $852, a difference of $45.
The best time to fly is July. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Boston to Frankfurt is July, with average round-trip fares around $798. The lowest fare found in July is $715.
Sunday departures are the cheapest, averaging $807 round trip. The most expensive day is Thursday at $852.
Based on current pricing trends, booking for July travel offers the best value. Avoid June if possible, as fares average $854 compared to $798 in the cheapest month. August is a solid middle-ground option at $828.
Flying in July instead of June can save you approximately $56 per round trip. The cheapest month averages $798 while the most expensive averages $854.
Airlines, flight times, price calendar, and more for Boston to Frankfurt
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