Cheap Flights from Boston to Sydney
Browse current best options from Boston. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Boston
RatePunk searches hundreds of travel sites at once for deals on flights to Sydney
Prices updated 7 days ago
483 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated Oct 26, 2026.)
Today’s best flight deals from Boston to Sydney
Explore current cheapest deals departing from Boston to Sydney
2026-11-09 – 2026-11-23
BOS - Sydney
77% AI deal score
$1,179
$1,152
Round trip
2026-12-06 – 2026-12-13
BOS - Sydney
80% AI deal score
$1,319
$1,205
Round trip
2026-11-08 – 2026-11-23
BOS - Sydney
77% AI deal score
$1,186
$1,271
Round trip
2026-10-27 – 2026-11-10
BOS - Sydney
77% AI deal score
$1,264
$1,308
Round trip
2027-02-01 – 2027-03-03
BOS - Sydney
76% AI deal score
$1,093
$1,309
Round trip
2026-10-28 – 2026-11-02
BOS - Sydney
81% AI deal score
$1,446
$1,313
Round trip
2026-11-16 – 2026-11-24
BOS - Sydney
77% AI deal score
$1,180
$1,316
Round trip
2026-11-02 – 2026-11-16
BOS - Sydney
76% AI deal score
$1,209
$1,337
Round trip
2026-11-10 – 2026-11-24
BOS - Sydney
76% AI deal score
$1,168
$1,339
Round trip
2026-11-11 – 2026-11-18
BOS - Sydney
77% AI deal score
$1,203
$1,341
Round trip
