What is the cheapest month to fly from Trenton to Saint Louis?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Trenton (TTN) to Saint Louis (STL), with fares starting from $137.

What is the lowest current fare from TTN to STL?

The lowest currently-listed fare from Trenton (TTN) to Saint Louis (STL) is $137 on 2026-09-09.

Is there a direct flight from Trenton to Saint Louis?

There is currently no non-stop service from TTN to STL. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Trenton to Saint Louis

Cheapest current fares: $137 in September 2026 on connecting flights.

Last updated August 11, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Trenton (TTN) to Saint Louis (STL). Refreshed daily.

Trenton (TTN) → Saint Louis (STL)

September 2026 $137
August 2026 $419

Frequently asked questions

What is the cheapest month to fly from Trenton to Saint Louis?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Trenton (TTN) to Saint Louis (STL), with fares starting from $137.
What is the lowest current fare from TTN to STL?

The lowest currently-listed fare from Trenton (TTN) to Saint Louis (STL) is $137 on 2026-09-09.
Is there a direct flight from Trenton to Saint Louis?

There is currently no non-stop service from TTN to STL. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.