What is the difference between the most popular and the most frequent airline at St. Louis?

Delta operates the most flights from Ireland to St. Louis at 0 per week, while Aer Lingus is the airline most often selected by KAYAK users searching for flights from Ireland to St. Louis. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

How far is Lambert-St Louis from St. Louis city centre?

Lambert-St Louis is 21.1 km from St. Louis city centre.

How do I know if a flight to St. Louis is a good deal?

A good deal on a flight to St. Louis is around €879 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

What is the cheapest flight to St. Louis?

Dublin to St. Louis is the cheapest route at €637 return, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

How much is a flight to St. Louis?

On average, a return flight from Ireland to St. Louis costs €1,027, based on KAYAK data over the past 12 months. Return fares from Dublin average €1,032.

What is the cheapest day to fly to St. Louis?

Tuesday is the cheapest day to fly to St. Louis at €869 return on average over the past 12 months on KAYAK. Sunday is the most expensive at €1,197.

What is the cheapest time of day to fly to St. Louis?

Afternoon flights to St. Louis are the cheapest at €932 return on average. Morning flights are the most expensive at €1,017.

What are the most popular airlines flying to St. Louis?

Aer Lingus is the most popular airline flying to St. Louis on KAYAK, followed by United Airlines.

€637 CHEAP FLIGHTS to St. Louis in 2026/27

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Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest return flight

€637

Typical prices: €879-€1,134

Iberia

Wed 14/11Sun 18/11

DUB - STL • 1 stop

Cheapest one-way flight

€335

Typical prices: €654-€889

Multiple Airlines

Wed 21/11

DUB - STL • 3 stops

Top airlines

Aer Lingus

Best reviews • 7.3 score

Airline reviews

When to travel

January

Cheapest • 15% price drop

July

Most popular

Good to know

Start a new search

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We hope you enjoy your trip to St. Louis!

Flight Deals

Cheap Flights to St. Louis

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

All Flight Deals

Recent return flight deals to St. Louis

Sat, 14 Nov - Wed, 18 Nov

12:55 - 21:59DUB Dublin-STL Lambert-St Louis

15h 04m1 stop Dallas/Fort Worth

13:15 - 08:40STL Lambert-St Louis-DUB Dublin

13h 25m1 stop Philadelphia

€637Iberia

Thu, 14 Jan - Mon, 18 Jan

11:30 - 20:31DUB Dublin-STL Lambert-St Louis

15h 01m1 stop Philadelphia

13:12 - 09:10STL Lambert-St Louis-DUB Dublin

13h 58m2 stops Boston Logan Intl Philadelphia

€660American Airlines

Sat, 12 Dec - Sat, 2 Jan

11:30 - 23:10DUB Dublin-STL Lambert-St Louis

17h 40m1 stop Philadelphia

06:12 - 09:00STL Lambert-St Louis-DUB Dublin

20h 48m1 stop Philadelphia

€686Iberia

Sat, 14 Nov - Wed, 18 Nov

11:30 - 22:39DUB Dublin-STL Lambert-St Louis

17h 09m2 stops Philadelphia Charlotte Douglas

13:15 - 08:40STL Lambert-St Louis-DUB Dublin

13h 25m1 stop Philadelphia

€701American Airlines

Sat, 12 Dec - Sat, 2 Jan

20:40 - 19:58DUB Dublin-STL Lambert-St Louis

29h 18m2 stops London Heathrow Chicago O'Hare Intl

13:51 - 17:45STL Lambert-St Louis-DUB Dublin

21h 54m2 stops Chicago O'Hare Intl London Heathrow

€724British Airways

Fri, 18 Dec - Thu, 31 Dec

12:20 - 21:30DUB Dublin-STL Lambert-St Louis

15h 10m1 stop Washington, D.C. Dulles Intl

12:33 - 09:00STL Lambert-St Louis-DUB Dublin

14h 27m1 stop Philadelphia

€729Multiple Airlines

Mon, 21 Dec - Sun, 3 Jan

11:30 - 19:52DUB Dublin-STL Lambert-St Louis

14h 22m1 stop Chicago O'Hare Intl

16:32 - 11:15STL Lambert-St Louis-DUB Dublin

12h 43m2 stops Chicago O'Hare Intl London Heathrow

€759Multiple Airlines

Fri, 18 Dec - Thu, 31 Dec

11:30 - 22:50DUB Dublin-STL Lambert-St Louis

17h 20m1 stop Chicago O'Hare Intl

16:32 - 14:55STL Lambert-St Louis-DUB Dublin

16h 23m2 stops Chicago O'Hare Intl London Heathrow

€762Multiple Airlines

Fri, 20 Nov - Fri, 4 Dec

11:30 - 00:10DUB Dublin-STL Lambert-St Louis

18h 40m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:40 - 10:15STL Lambert-St Louis-DUB Dublin

15h 35m2 stops Baltimore/Washington Reykjavik Keflavik Intl

€770Multiple Airlines

Sat, 12 Dec - Sat, 2 Jan

11:30 - 19:57DUB Dublin-STL Lambert-St Louis

14h 27m2 stops Philadelphia Chicago O'Hare Intl

06:12 - 09:00STL Lambert-St Louis-DUB Dublin

20h 48m1 stop Philadelphia

€777American Airlines

All return flight deals to St. Louis

Sat, 14 Nov - Wed, 18 Nov

12:55 - 21:59DUB Dublin-STL Lambert-St Louis

15h 04m1 stop Dallas/Fort Worth

13:15 - 08:40STL Lambert-St Louis-DUB Dublin

13h 25m1 stop Philadelphia

€637Iberia

Thu, 14 Jan - Mon, 18 Jan

11:30 - 20:31DUB Dublin-STL Lambert-St Louis

15h 01m1 stop Philadelphia

13:12 - 09:10STL Lambert-St Louis-DUB Dublin

13h 58m2 stops Boston Logan Intl Philadelphia

€660American Airlines

Sat, 12 Dec - Sat, 2 Jan

11:30 - 23:10DUB Dublin-STL Lambert-St Louis

17h 40m1 stop Philadelphia

06:12 - 09:00STL Lambert-St Louis-DUB Dublin

20h 48m1 stop Philadelphia

€686Iberia

Sat, 14 Nov - Wed, 18 Nov

11:30 - 22:39DUB Dublin-STL Lambert-St Louis

17h 09m2 stops Philadelphia Charlotte Douglas

13:15 - 08:40STL Lambert-St Louis-DUB Dublin

13h 25m1 stop Philadelphia

€701American Airlines

Sat, 12 Dec - Sat, 2 Jan

20:40 - 19:58DUB Dublin-STL Lambert-St Louis

29h 18m2 stops London Heathrow Chicago O'Hare Intl

13:51 - 17:45STL Lambert-St Louis-DUB Dublin

21h 54m2 stops Chicago O'Hare Intl London Heathrow

€724British Airways

Fri, 18 Dec - Thu, 31 Dec

12:20 - 21:30DUB Dublin-STL Lambert-St Louis

15h 10m1 stop Washington, D.C. Dulles Intl

12:33 - 09:00STL Lambert-St Louis-DUB Dublin

14h 27m1 stop Philadelphia

€729Multiple Airlines

Mon, 21 Dec - Sun, 3 Jan

11:30 - 19:52DUB Dublin-STL Lambert-St Louis

14h 22m1 stop Chicago O'Hare Intl

16:32 - 11:15STL Lambert-St Louis-DUB Dublin

12h 43m2 stops Chicago O'Hare Intl London Heathrow

€759Multiple Airlines

Fri, 18 Dec - Thu, 31 Dec

11:30 - 22:50DUB Dublin-STL Lambert-St Louis

17h 20m1 stop Chicago O'Hare Intl

16:32 - 14:55STL Lambert-St Louis-DUB Dublin

16h 23m2 stops Chicago O'Hare Intl London Heathrow

€762Multiple Airlines

Fri, 20 Nov - Fri, 4 Dec

11:30 - 00:10DUB Dublin-STL Lambert-St Louis

18h 40m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:40 - 10:15STL Lambert-St Louis-DUB Dublin

15h 35m2 stops Baltimore/Washington Reykjavik Keflavik Intl

€770Multiple Airlines

Sat, 12 Dec - Sat, 2 Jan

11:30 - 19:57DUB Dublin-STL Lambert-St Louis

14h 27m2 stops Philadelphia Chicago O'Hare Intl

06:12 - 09:00STL Lambert-St Louis-DUB Dublin

20h 48m1 stop Philadelphia

€777American Airlines

Booking Insights

Price, demand, and travel trends for flights to St. Louis

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

What is the cheapest flight to St. Louis?: Dublin to St. Louis is the cheapest route at €637 return, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.
How much is a flight to St. Louis? Average and cheapest price for all return flights to St. Louis from each origin found by users searching on KAYAK in the last 12 months.: On average, a return flight from Ireland to St. Louis costs €1,027, based on KAYAK data over the past 12 months. Return fares from Dublin average €1,032.
What is the cheapest day to fly to St. Louis?: Tuesday is the cheapest day to fly to St. Louis at €869 return on average over the past 12 months on KAYAK. Sunday is the most expensive at €1,197.
What is the cheapest time of day to fly to St. Louis? Average price for all return flights depending on time of departure, seen by users on KAYAK in the last 12 months.: Afternoon flights to St. Louis are the cheapest at €932 return on average. Morning flights are the most expensive at €1,017.

Find deals

Low season	November
High season	July
Cheapest flight	€335

Beat the crowds with an average 76% drop in travellers.

The most popular month to fly with an average 36% increase in travellers.

One-way flight from Dublin to St. Louis

When to book flights to St. Louis

Are your dates flexible? Find out the best times to travel to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. The information is for flights to St. Louis based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

How do I know if a flight to St. Louis is a good deal?
A good deal on a flight to St. Louis is around €879 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.
How far is Lambert-St Louis from St. Louis city centre?
Lambert-St Louis is 21.1 km from St. Louis city centre.
What is the difference between the most popular and the most frequent airline at St. Louis?
Delta operates the most flights from Ireland to St. Louis at 0 per week, while Aer Lingus is the airline most often selected by KAYAK users searching for flights from Ireland to St. Louis. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

For flights to St. Louis, a good return fare is around €879. If you find a fare below that, you're getting a strong deal.
If your travel dates are flexible, consider flying to St. Louis in January. Return fares historically average €869, making January the cheapest month to travel based on KAYAK data from the last 12 months.
Before you book:

• Check the route's typical price range so you can spot a deal.
• Confirm baggage fees and seat selection costs on budget carriers.
• Verify whether you need any travel documents beyond an ID.
• Pick a departure airport, since your nearest may not be the cheapest origin.
Shift your departure to midday to save up to €84 on a return flight. Midday flights to St. Louis average €932 compared to €1,017 for morning flights.
Once you arrive in St. Louis, a great place to start is America's Center Convention Complex. It is popular with first-time visitors and can give you a good feel for the area.

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€335 Find Cheap Flights to St. Louis – Compare and Save

Everything you should know

Cheap Flights to St. Louis

Recent return flight deals to St. Louis

Recent one-way flight deals to St. Louis

All return flight deals to St. Louis

Price, demand, and travel trends for flights to St. Louis

What is the cheapest flight to St. Louis?

How much is a flight to St. Louis?

What is the cheapest day to fly to St. Louis?

What is the cheapest time of day to fly to St. Louis?

What are the most popular airlines flying to St. Louis?

Key details for flights to St. Louis

Low season

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Cheapest flight

When to book flights to St. Louis

Your questions about flights to St. Louis, answered

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