Cheapest return flights from Seattle to Sydney in April from 763€

Best time to book flights for Seattle (SEA) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Sydney (SYD) in April 2025 (see full year).

Return flights

01 Apr - 05 May Hawaiian Airlines
06 Apr - 06 May United
06 Apr - 22 Apr United
15 Apr - 22 Apr United
08 Apr - 30 Apr United
06 Apr - 30 Apr United
17 Apr - 24 Apr Delta
10 Apr - 22 Apr Air Canada
04 Apr - 05 May Frontier Airlines
18 Apr - 25 Apr Delta
04 Apr - 06 May Frontier Airlines
04 Apr - 11 Apr Hawaiian Airlines
11 Apr - 20 Apr Hawaiian Airlines
24 Apr - 08 May Air Canada

Also check the deals for one-way flights from Seattle to Sydney in April.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Sydney

Cheap car rent in Sydney