Cheap flights from Boston to Sydney

One-way fares from $729 · BOS → SYD · prices found by travellers in the last 48 hours

Compare all dates Sydney → Boston
Cheapest fare
$729

Alaska Airlines · Sat, Nov 14

Cheapest month
November

from $729

Direct flights
Not recently

Usually 1+ stop

Quickest trip
23h 16m

16,240 km

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Cheapest month to fly from Boston to Sydney

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $729

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

Alaska Airlines
Depart19:03 Sat, Nov 14BOS → SYD 23h 16m · 2 stops
$729one way, per person
View deal
See every date in November 2026 →

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Where to stay, what to do and getting around, from our travel partners.

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Things to do

Things to do in SydneyTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in SydneyPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in SydneyCompare rental cars from major brands on EconomyBookings Compare cars →

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About flights from Boston to Sydney

Boston (BOS) and Sydney (SYD) are about 16,240 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 23h 16m. Over the next few months, one-way fares start from $729, and November 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Boston to Sydney?

The cheapest one-way fare we've seen recently is $729 with Alaska Airlines, departing Saturday, November 14, 2026.

What is the cheapest month to fly from Boston to Sydney?

November 2026 currently has the lowest fares, from $729 one way.

Are there direct flights from Boston to Sydney?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Boston to Sydney?

The quickest journey we've seen takes about 23h 16m. Boston and Sydney are around 16,240 km apart.

Which airlines fly from Boston to Sydney?

Recent fares on this route were with Alaska Airlines.

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