Cheap Flights from St Louis to Perth
No deal from St Louis to Perth has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from St Louis to Perth, the lowest round-trip fare we recorded was $1368, in August. The typical fare was $1509. August was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $1538 on American, Alaska, and Cathay Pacific, seen Oct 16. It is an unverified observation and may have changed.
See every deal <a href="/from/st-louis">from St Louis</a>, <a href="/to/perth">to Perth</a>, or the return direction <a href="/from/perth/to/st-louis">Perth to St Louis</a>.
Latest price we saw: St Louis to Perth
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| St Louis (STL) to Perth (PER) | $1538 | 7.1¢ | Oct 26 – Nov 4 | American, Alaska, and Cathay Pacific | Oct 16 | Check price |
Price history: St Louis to Perth
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $1537 | $1539 | 6 |
| Sep 2026 | $1369 | $1496 | 18 |
| Aug 2026 | $1368 | $1458 | 28 |
| Jul 2026 | $1545 | $1545 | 1 |
Frequently asked questions
How many flight deals from St Louis to Perth are on Sparkflights right now?
There are 0 verified deals from St Louis to Perth on the board right now. The list refreshes hourly.
What is the lowest price ever seen from St Louis to Perth?
The lowest fare we've recorded from St Louis to Perth is $1368, based on 53 price observations over 4 months.
How much does a flight from St Louis to Perth cost?
The typical round-trip fare we observed from St Louis to Perth is $1509, against a recorded low of $1368. These are observations, not quotes.
When is the cheapest month to fly St Louis to Perth?
August was the cheapest month we observed from St Louis to Perth and July the dearest, over 4 months of data.
What is the current price from St Louis to Perth?
The most recent fare our sweep saw from St Louis to Perth is $1538, on Oct 16. It is an unverified observation rather than a verified deal, so check it before booking.