Cheap flights from Portsmouth to Singapore

View AU$497 flight on Thu, 18 Sep. 2025Opens in a new window

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Cheap Flights from Portsmouth (BOS) to Singapore (SIN)

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, 4 Aug. - Sat, 30 Aug.
BOS
Boston
SIN
Singapore
AU$1,215 Return, found 3 days ago
AU$1,215
Return
found 3 days ago
Select United flight, departing Mon, 4 Aug. from Boston to Singapore, returning Sat, 30 Aug., priced at AU$1,215 found 3 days ago
Turkish Airlines
Mon, 8 Sep. - Tue, 23 Sep.
BOS
Boston
SIN
Singapore
AU$1,248 Return, found 19 hours ago
AU$1,248
Return
found 19 hours ago
Select Turkish Airlines flight, departing Mon, 8 Sep. from Boston to Singapore, returning Tue, 23 Sep., priced at AU$1,248 found 19 hours ago
Korean Air
Mon, 8 Sep. - Tue, 23 Sep.
BOS
Boston
SIN
Singapore
AU$1,264 Return, found 19 hours ago
AU$1,264
Return
found 19 hours ago
Select Korean Air flight, departing Mon, 8 Sep. from Boston to Singapore, returning Tue, 23 Sep., priced at AU$1,264 found 19 hours ago
Etihad Airways
Mon, 8 Sep. - Tue, 23 Sep.
BOS
Boston
SIN
Singapore
AU$1,364 Return, found 19 hours ago
AU$1,364
Return
found 19 hours ago
Select Etihad Airways flight, departing Mon, 8 Sep. from Boston to Singapore, returning Tue, 23 Sep., priced at AU$1,364 found 19 hours ago
Air Canada
Mon, 8 Sep. - Tue, 23 Sep.
BOS
Boston
SIN
Singapore
AU$1,398 Return, found 19 hours ago
AU$1,398
Return
found 19 hours ago
Select Air Canada flight, departing Mon, 8 Sep. from Boston to Singapore, returning Tue, 23 Sep., priced at AU$1,398 found 19 hours ago
Delta
Thu, 4 Sep. - Tue, 9 Sep.
BOS
Boston
SIN
Singapore
AU$1,410 Return, found 4 days ago
AU$1,410
Return
found 4 days ago
Select Delta flight, departing Thu, 4 Sep. from Boston to Singapore, returning Tue, 9 Sep., priced at AU$1,410 found 4 days ago

Find the cheapest month to fly from Boston (BOS) to Singapore (SIN)

March is typically the cheapest month to fly

From AU$1,214 - AU$3,315 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.