Cheap flights from Boston to Costa de Prata

View AU$373 flight on Wed, 12 Nov. 2025Opens in a new window

Popular airlines from Boston to Costa de Prata

  • American Airlines

    American Airlines

  • Air Canada

    Air Canada

  • Air France

    Air France

  • British Airways

    British Airways

  • Iberia

    Iberia

  • KLM

    KLM

  • Lufthansa

    Lufthansa

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Cheap Flights from Boston (BOS) to Costa de Prata (OPO)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, 25 Aug. - Thu, 28 Aug.
BOS
Boston
OPO
Porto
AU$1,014 Return, found 1 day ago
AU$1,014
Return
found 1 day ago
Select United flight, departing Mon, 25 Aug. from Boston to Porto, returning Thu, 28 Aug., priced at AU$1,014 found 1 day ago
United
Mon, 25 Aug. - Thu, 28 Aug.
BOS
Boston
OPO
Porto
AU$1,014 Return, found 1 day ago
AU$1,014
Return
found 1 day ago
Select United flight, departing Mon, 25 Aug. from Boston to Porto, returning Thu, 28 Aug., priced at AU$1,014 found 1 day ago
Swiss International Air Lines
Mon, 25 Aug. - Thu, 28 Aug.
BOS
Boston
OPO
Porto
AU$1,200 Return, found 1 day ago
AU$1,200
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 25 Aug. from Boston to Porto, returning Thu, 28 Aug., priced at AU$1,200 found 1 day ago
KLM
Mon, 25 Aug. - Thu, 28 Aug.
BOS
Boston
OPO
Porto
AU$1,211 Return, found 1 day ago
AU$1,211
Return
found 1 day ago
Select KLM flight, departing Mon, 25 Aug. from Boston to Porto, returning Thu, 28 Aug., priced at AU$1,211 found 1 day ago
Lufthansa
Mon, 25 Aug. - Thu, 28 Aug.
BOS
Boston
OPO
Porto
AU$1,256 Return, found 1 day ago
AU$1,256
Return
found 1 day ago
Select Lufthansa flight, departing Mon, 25 Aug. from Boston to Porto, returning Thu, 28 Aug., priced at AU$1,256 found 1 day ago
Air Canada
Mon, 25 Aug. - Thu, 28 Aug.
BOS
Boston
OPO
Porto
AU$1,368 Return, found 1 day ago
AU$1,368
Return
found 1 day ago
Select Air Canada flight, departing Mon, 25 Aug. from Boston to Porto, returning Thu, 28 Aug., priced at AU$1,368 found 1 day ago

Find the cheapest month to fly from Boston (BOS) to Porto (OPO)

November is typically the cheapest month to fly

From AU$481 - AU$1,075 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.