Cheap flights from St. Louis to Ireland from $351
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ireland departing on 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Mon 11/2
2:25 pm-7:45 am
1 stop11h 20m
Dublin
Wed 11/18
10:45 am-11:56 pm
2 stops19h 11m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Wed 12/2
10:06 am-7:45 am
1 stop15h 39m
Dublin
Thu 12/10
9:55 am-9:38 pm
1 stop17h 43m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Wed 11/18
2:31 pm-7:45 am
1 stop11h 14m
Dublin
Thu 11/26
9:55 am-10:53 pm
1 stop18h 58m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Tue 12/1
2:17 pm-9:45 am
2 stops13h 28m
Dublin
Tue 12/8
10:45 am-9:38 pm
2 stops16h 53m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Wed 2/17
3:40 pm-7:45 am
1 stop10h 05m
Dublin
Thu 2/25
9:55 am-6:01 pm
1 stop14h 06m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Mon 2/15
7:04 pm-8:10 am
1 stop31h 06m
Dublin
Thu 2/18
9:00 am-3:57 pm
2 stops36h 57m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Mon 2/15
5:00 am-8:10 am
1 stop21h 10m
Dublin
Thu 2/18
9:00 am-3:57 pm
2 stops36h 57m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Wed 1/13
3:40 pm-4:30 pm
1 stop18h 50m
Dublin
Wed 1/20
5:10 am-1:45 pm
1 stop14h 35m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Wed 1/20
3:40 pm-4:30 pm
1 stop18h 50m
Dublin
Wed 1/27
5:10 am-1:45 pm
1 stop14h 35m
St. LouisDublin
STL Lambert-St Louis - DUB Dublin
STLDUB
Lambert-St Louis
Tue 3/9
10:00 am-9:45 am
2 stops17h 45m
Dublin
Wed 3/17
5:45 am-12:36 am
2 stops23h 51m
See travel insights to Ireland from
How to get the cheapest flight ticket from St. Louis to Ireland
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Ireland?
In general, September is the cheapest month to fly from St. Louis to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $423. If you aren’t able to travel to Ireland during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $498.
How far in advance should I book a flight from St. Louis to Ireland?
You are more likely to see cheaper flights to Ireland from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around $746 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from St. Louis for as low as $503 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Ireland?
United Airlines, Delta, and KLM are the most popular carriers operating from Lambert-St Louis to Ireland
What airlines fly to Ireland?
Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Ireland from St. Louis according to our data. Aer Lingus is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Ireland. Keep in mind that there are 8 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to Ireland flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Ireland
Frequently asked questions about flying from St. Louis to Ireland
When did momondo last update prices for flights from Lambert-St Louis Airport to Ireland?
Prices for flights from Lambert-St Louis Airport to Ireland are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Ireland?
The number of operators available for flights from Lambert-St Louis Airport to Ireland is 8 as of October 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Ireland?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ireland.
What documentation or ID do you need to fly to Ireland?
The travel and health documents required for your trip to Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from St. Louis to Ireland
Compare and see reviews for airlines that fly from St. Louis to Ireland with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $325 | Free Cancellation | Rating 7.3 1,817 reviews | |||
| PriceFrom $429 | Free Cancellation | Rating 6.7 8,256 reviews | |||
| PriceFrom $430 | Free Cancellation | Rating 6.8 8,269 reviews | |||
| PriceFrom $474 | Free Cancellation | Rating 7.1 11,748 reviews | |||
| PriceFrom $482 | Free Cancellation | Rating 7.0 12,150 reviews | |||
| PriceFrom $484 | Free Cancellation | Rating 7.8 8,651 reviews | |||
| PriceFrom $489 | Free Cancellation | Rating 7.4 10,331 reviews | |||
| PriceFrom $538 | Free Cancellation | Rating 7.8 1,580 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Ireland?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Ireland. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to Ireland with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Ireland flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Ireland?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Ireland.
I’m not ready to book a flight from St. Louis to Ireland right now. Can momondo alert me if prices change?
Price alerts on flights to Ireland from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.