St Louis to Islip flights

Routavio compares airline fares from several flight booking sites. Search St Louis to Islip to see the lowest price before you book.

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Lowest fare seen

€130Seen on 14 Oct 2026

Last checked

29 Oct 2026

Observed fares. Prices may change.

Your next trip, last seen at €130

Lowest observed

2 Nov 2026

Frontier Airlines · 2 stops · One way

Cheapest observed day · Last checked: 14 Oct 2026

Departure

18:44

When to fly

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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.

One-way fare

One-way fare · No data: click and we will search

Airlines seen: Air Canada, Breeze Airways, Frontier Airlines, JetBlue, Southern Airways Express
Typical journey time: 25h 08m

Short answer

Routavio has seen Air Canada fares from St Louis to Islip. These are prices Routavio's searches returned on the dates shown, not quotes; run a live search for today's fare. Lowest fare seen: €130 on 14 Oct 2026.

About this route

Explore the fares we observed from St Louis to Islip. Prices move often, so pick your dates to see the latest options.

Route distance: 1,480 km
Typical journey time: 25h 08m
Seen on fares with a connection: Frontier Airlines, Southern Airways Express, Breeze Airways, JetBlue
Alternative airports: SUS

Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.

A clearer picture of your fare

Observed, not guaranteed

Every price is a fare we actually saw, and it may change at any time.

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The price is final on the provider's site, where your booking is completed.

How our prices work

Airport to city: straight-line distance

St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.

Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.

Frequently asked

How much was a flight from St Louis to Islip?

A fare of €130 was seen on 14 Oct 2026. Fares change, so search your dates for the current price.

Are there direct flights from St Louis to Islip?

Our data holds no non-stop flight from St Louis to Islip. The fares on this page include at least one stop.

Which airlines fly from St Louis to Islip?

Routavio has seen these carriers on the route: Air Canada, Breeze Airways, Frontier Airlines, JetBlue, Southern Airways Express.

How long does the flight from St Louis to Islip take?

Across the 84 fares Routavio observed, the average journey time is 27h 48m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.

How many of the observed St Louis to Islip fares were non-stop?

None of the 84 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.

How observed prices work, what "No data" means and what a fare includes: Read the flight price guide