July is the cheapest month to fly this route, with average fares around $695 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $759 | $656 | ||
| June 2026 | $778 | $681 | Peak | |
| July 2026 | $695 | $587 | Best | |
| August 2026 | $731 | $688 |
Departing on Thursday offers the lowest average fares at $709. Saturday departures are the most expensive at $769, a difference of $60.
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 Barcelona is July, with average round-trip fares around $695. The lowest fare found in July is $587.
Thursday departures are the cheapest, averaging $709 round trip. The most expensive day is Saturday at $769.
Based on current pricing trends, booking for July travel offers the best value. Avoid June if possible, as fares average $778 compared to $695 in the cheapest month. May is a solid middle-ground option at $759.
Flying in July instead of June can save you approximately $83 per round trip. The cheapest month averages $695 while the most expensive averages $778.
Airlines, flight times, price calendar, and more for Boston to Barcelona
View BOS → BCN Details