$398 Cheap Flights from St. Louis (STL) to Dublin (DUB)

View $398 flight on Sun, Nov 30, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Dublin Airport (DUB)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from St. Louis to Dublin (STL-DUB)

Prices were available within the past 7 days and start at $398 for one-way flights and $487 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Oct 19 - Fri, Nov 7
STL
St. Louis
DUB
Dublin
$487 Roundtrip, found 1 hour ago
$487
Roundtrip
found 1 hour ago
Select United flight, departing Sun, Oct 19 from St. Louis to Dublin, returning Fri, Nov 7, priced at $487 found 1 hour ago
Air Canada
Mon, Oct 20 - Fri, Nov 7
STL
St. Louis
DUB
Dublin
$489 Roundtrip, found 3 days ago
$489
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Oct 20 from St. Louis to Dublin, returning Fri, Nov 7, priced at $489 found 3 days ago
United
Wed, Apr 29 - Wed, May 13
STL
St. Louis
DUB
Dublin
$491 Roundtrip, found 1 hour ago
$491
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Apr 29 from St. Louis to Dublin, returning Wed, May 13, priced at $491 found 1 hour ago
United
Sun, Oct 19 - Wed, Nov 5
STL
St. Louis
DUB
Dublin
$493 Roundtrip, found 1 hour ago
$493
Roundtrip
found 1 hour ago
Select United flight, departing Sun, Oct 19 from St. Louis to Dublin, returning Wed, Nov 5, priced at $493 found 1 hour ago
United
Tue, Jan 20 - Wed, Jan 28
STL
St. Louis
DUB
Dublin
$494 Roundtrip, found 4 hours ago
$494
Roundtrip
found 4 hours ago
Select United flight, departing Tue, Jan 20 from St. Louis to Dublin, returning Wed, Jan 28, priced at $494 found 4 hours ago
Air Canada
Sat, Oct 25 - Wed, Nov 5
STL
St. Louis
DUB
Dublin
$495 Roundtrip, found 3 hours ago
$495
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Sat, Oct 25 from St. Louis to Dublin, returning Wed, Nov 5, priced at $495 found 3 hours ago
United
Tue, Jan 20 - Wed, Jan 28
STL
St. Louis
DUB
Dublin
$497 Roundtrip, found 4 hours ago
$497
Roundtrip
found 4 hours ago
Select United flight, departing Tue, Jan 20 from St. Louis to Dublin, returning Wed, Jan 28, priced at $497 found 4 hours ago
American Airlines
Tue, Nov 11 - Thu, Nov 20
STL
St. Louis
DUB
Dublin
$500 Roundtrip, found 6 days ago
$500
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Nov 11 from St. Louis to Dublin, returning Thu, Nov 20, priced at $500 found 6 days ago
Delta
Wed, Nov 5 - Wed, Nov 19
STL
St. Louis
DUB
Dublin
$502 Roundtrip, found 1 hour ago
$502
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, Nov 5 from St. Louis to Dublin, returning Wed, Nov 19, priced at $502 found 1 hour ago
Iberia
Mon, Oct 27 - Wed, Nov 12
STL
St. Louis
DUB
Dublin
$502 Roundtrip, found 1 hour ago
$502
Roundtrip
found 1 hour ago
Select Iberia flight, departing Mon, Oct 27 from St. Louis to Dublin, returning Wed, Nov 12, priced at $502 found 1 hour ago

Find the cheapest month to fly from St. Louis (STL) to Dublin (DUB)

November is typically the cheapest month to fly

From $417 - $1,202 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB) cost?
Lock in a cheap one-way flight from $398 or cheap return flight from $487 from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB)?
October is the cheapest month to fly from STL to DUB. Avoiding peak travel times is often the key to finding a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from STL to DUB. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to DUB?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB) last-minute?
Booking your plane ticket from STL to DUB just before your trip is typically more expensive. But if you're flexible with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to DUB flight and hotel package?
Booking a STL to DUB flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our wide range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Dublin Airport (DUB)?
Generally, it's possible to reschedule or cancel your STL to DUB flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Dublin
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, United
Roundtrip price
$487
Distance
3912 mi

Book with confidence

Book with confidence

St. Louis to Dublin Flights

The cheapest times to fly from St. Louis to Dublin

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Dublin are during the month of October. You can find some of the cheapest flights from St. Louis to Dublin with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Dublin

Sunday is one of the best days to book for cheap flights from St. Louis to Dublin: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Dublin

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Dublin in 2025. You can also book with separate airlines for your outbound and return journeys, from $398 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Dublin flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Dublin airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Dublin Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.