Cheap flights from St. Louis to Ireland from $291
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 10/3. 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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United Airlines flights from St. Louis to Ireland
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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, February 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 $698. If you aren’t able to travel to Ireland during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $708.
What is the cheapest day to depart on your flight to Ireland?
The cheapest day to depart on your flight to Ireland is on a Wednesday when prices can be found for as low as $865. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Ireland on a Saturday will generally be more expensive and average around $972. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Ireland?
According to our data, the cheapest time of day to fly to Ireland is in the evening. momondo users have found flights departing from St. Louis to Ireland in the evening for as low as $556. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Ireland is at noon when prices are around $1,057.
How far in advance should I book a flight 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 $900 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 $692 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Ireland?
Aer Lingus, British Airways, and Delta are the most popular carriers operating from Lambert-St Louis to Ireland
What airlines fly to Ireland?
United Airlines, American Airlines and Air Canada are the top three most popular airlines that fly to Ireland from St. Louis according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Ireland. Keep in mind that there are 9 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
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 9 as of July 2025.
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 $482 | Free Cancellation | Rating 7.8 1,367 reviews | |||
| PriceFrom $485 | Free Cancellation | Rating 7.1 9,681 reviews | |||
| PriceFrom $485 | Free Cancellation | Rating 7.0 2,820 reviews | |||
| PriceFrom $500 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom $504 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $518 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $560 | Free Cancellation | Rating 6.8 7,207 reviews | |||
| PriceFrom $602 | Free Cancellation | Rating 8.0 7,982 reviews | |||
| PriceFrom $736 | Free Cancellation | Rating 7.1 1,144 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.