Cheap Flights Dublin – St. Louis from £320

Flight FAQs

• Which airlines offer the cheapest flights from Dublin (DUB) to St. Louis (STL)?

  Based on Trip.com data, WestJet offers one-way fares as low as £320 on Cheapest nonstop routes (e.g. DUB to STL on Fri, Mar 20), while Finnair offers Cheapest nonstop round-trips from £644 departing on Fri, Apr 3 and returning on Tue, Apr 7.

• Which airlines offer direct flights from Dublin to St. Louis?

  At the moment, you can catch a direct flight from Dublin to St. Louis with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• When is the best time to book flights from Dublin to St. Louis?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Dublin to St. Louis is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Dublin to St. Louis?

  To find best deals on flights from Dublin to St. Louis, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Mar 20, with one-way flights priced at just £320.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is WestJet.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for St. Louis travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from Dublin to St. Louis to get the best price?

  The cheapest months to fly from Dublin to St. Louis is November, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from Dublin to St. Louis?

  After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Dublin to St. Louis on February 20, 2026 with American Airlines, with prices starting at £649.

• Which airports can I fly through when travelling to St. Louis from Dublin?

  You can land at any one of the following hubs in St. Louis, with Dublin Airport to St. Louis Lambert International Airport (DUB-STL) is by far the most common option on this route: St. Louis Downtown Airport (CPS) St. Louis Lambert International Airport (STL).

• What is the time difference between Dublin and St. Louis?

  The time difference between St. Louis and Dublin is 6h.

• How can I change or cancel my flight ticket from Dublin to St. Louis?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.