International route
Cheap flights from Boston to Porto
Boston Logan International Airport (BOS) to Porto Airport (OPO). 3,136 miles, connecting flights only.
BOS to OPO at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 3,136 milesgreat-circle
- Typical flight time
- 6h 5mif flown nonstop
- Nonstop airlines
- None (connecting only)
- Nonstop flights per day
- 0connections available
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Tuesday19% less than Sunday
- Time difference
- 5h aheadPorto vs Boston
Boston to Porto
Round trips from $310
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Jan 5.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppBoston to Porto fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying Boston to Porto
No nonstop service: 6 airlines offer one-stop itineraries.
- EIAer LingusConnecting via DUB · first checked bag from $70
- AFAir FranceSkyTeamConnecting via CDG, ORY · first checked bag from $75
- BABritish AirwaysoneworldConnecting via LGW · first checked bag from $75
- IBIberiaoneworldConnecting via MAD · first checked bag from $70
- NONorse Atlantic AirwaysLow-costConnecting via LGW · first checked bag from $80
- LXSWISSStar AllianceConnecting via GVA · first checked bag from $75
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- London (LGW)BANO2 airlines
- Dublin (DUB)EI1 airline
- Paris (CDG)AF1 airline
- Paris (ORY)AF1 airline
- Geneva (GVA)LX1 airline
Tips for this route
- There is no scheduled nonstop between BOS and OPO. Every itinerary connects, most often through LGW, DUB or CDG, so sort results by total travel time rather than price alone.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $310; September 2026 is the most expensive at $435 and up, a difference of $125 per traveler.
- Departing on a Tuesday averages 19% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays.
- Porto is 5 hours ahead of Boston. Expect to lose 5 hours on the clock heading east, so an overnight or late-afternoon departure tends to arrive at a more usable hour.
Ready to compare live fares?
See every airline on BOS–OPO side by side with bags and seat rules spelled out.
Search Boston to PortoBoston to Porto: common questions
How long is the flight from Boston to Porto?
There are no nonstop flights, so the trip from Boston (BOS) to Porto (OPO) takes 6h 5m of flying plus a layover, usually 9h 5m or more door to door across 3,136 miles.
Which airlines fly nonstop from BOS to OPO?
No airline currently flies nonstop between Boston (BOS) and Porto (OPO). The most common connections are through LGW, DUB and CDG.
What is the cheapest month to fly from Boston to Porto?
Over the next six months, January 2027 has the lowest round-trip fares from Boston (BOS) to Porto (OPO), starting at $310 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book Boston to Porto flights?
Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between Boston and Porto?
Porto is 5 hours ahead of Boston. BOS is on America/New York time and OPO on Europe/Lisbon time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.