$111 Find Cheap Flights from Trenton to St. Louis - Compare and Save

In the last 5 days, the lowest price for a flight from Trenton to St. Louis was $111 for a one-way ticket and $210 for a round-trip.

No, a passport isn't needed to fly from Trenton to St. Louis. However, local authorities might ask for an official ID.

Trenton and St. Louis are both served by 1 main airport. You will leave Trenton from Trenton-Mercer and will be arriving at Lambert-St Louis.

We unfortunately don’t have that data for this specific route.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Trenton to St. Louis.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Trenton is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Trenton with another airline. Booking your flights between Trenton and STL can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Trenton up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.