Boston (BOS) to Lisbon (LIS) is about 3,184 miles (5,124 km), roughly 6 h 50 min of flying time. Lisbon is 5 hours ahead of Boston all year.
When is the cheapest time to fly from Boston to Lisbon?
Lowest round-trip fares found in recent searches for each month (7 to 14 day trips). Pick a cheap month, then confirm the live price.
Are there nearby airports that could be cheaper?
Fares at a neighboring airport are sometimes lower. Worth comparing on this route:
- PVDRhode Island T. F. Green International Airport south of Boston in Rhode Island.
- MHTManchester-Boston Regional Airport north of Boston in New Hampshire.
What do I need before flying to Lisbon?
This is an international trip, so you need a valid passport. Entry rules, visas and health requirements change, so check the official US State Department page before you book: Portugal travel information.
Plan how you will stay connected; an eSIM is usually cheaper than your carrier's roaming plan. See travel services.
Stay connected in Lisbon
An eSIM gives you local data from the moment you land, usually far cheaper than roaming.
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Things to do in Lisbon
Popular attractions and tickets, most with free cancellation.
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Frequently asked questions
How far is Boston from Lisbon by plane?
The great-circle distance between BOS and LIS is about 3,184 miles (5,124 km).
How long does it take to fly from Boston to Lisbon?
About 6 h 50 min of flying time based on distance, if a nonstop flight operates. Actual schedules vary by airline and wind, and itineraries with connections take longer.
What is the time difference between Boston and Lisbon?
Lisbon is 5 hours ahead of Boston all year.
Distance and flying time are calculated from airport coordinates (OurAirports data) and a typical cruise speed; they are planning estimates, not schedules. Updated 2026-10-28.
