Quick answer: January and February are the cheapest months to fly to Europe — 40-55% below July and August peaks. March and November are the next cheapest. Avoid June through August and December 20 – January 5 (holiday peak).
| Month | Avg Fare | Notes | Value |
|---|---|---|---|
| January | €89 | Lowest fares — post-holiday drop | ★★★★★ |
| February | €97 | Low demand, Valentine's spike (Feb 14) | ★★★★★ |
| March | €115 | Spring break creates a mid-month spike | ★★★★ |
| April | €142 | Easter spike — book 8 weeks ahead | ★★★ |
| May | €138 | Good weather, lower than summer | ★★★ |
| June | €189 | Summer begins — prices rise fast | ★★ |
| July | €241 | Peak season — book 3-4 months ahead | ★ |
| August | €252 | Most expensive month — school holidays | ★ |
| September | €167 | Shoulder season starts — great value | ★★★ |
| October | €131 | Excellent deals, mild weather | ★★★★ |
| November | €101 | Second cheapest month — low demand | ★★★★★ |
| December | €178 | Christmas spike — book 3+ months ahead | ★★ |
January is the cheapest month to fly from the US to Europe — transatlantic fares average $380-520 roundtrip versus $900-1,400 in July. February is the second cheapest. Book 3-4 months in advance even for January travel.
Fall (September-November) is slightly cheaper than spring (April-May) and offers better weather. October is the sweet spot: average European fares drop to €131 versus €142 in May, with fewer tourists at major sites.
July and August have the highest fares (€241-252 average). Christmas period (December 20 – January 5) and Easter weekend are secondary peaks. If you must fly in peak season, book 4-6 months ahead.