Cheap flights from Ireland to St. Louis from €522
This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to St. Louis departing on 4/12. 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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How to get the cheapest flight ticket from Ireland to St. Louis
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 St. Louis?
The cheapest month to fly to St. Louis from Ireland is in August. Flight prices, which tend to average around €696, are often lower during this time because this is during the off-season. The month of February is another great option to travel to St. Louis, with average flight prices from Ireland averaging around €708.
What is the cheapest day to depart on your flight to St. Louis?
On average, the least expensive day to fly to St. Louis from Ireland is on a Thursday. momondo users have found tickets for Thursday departures for as low as €723. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Ireland to St. Louis for around €900.
Cheap Ireland to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ireland to St. Louis
When did momondo last update prices for flights from Ireland to Lambert-St Louis Airport?
Prices for flights from Ireland to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from Ireland to Lambert-St Louis Airport?
The number of operators available for flights from Ireland to Lambert-St Louis Airport is 2 as of July 2025.
How old do you have to be to fly from Ireland to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Ireland to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
Best airlines flying from Ireland to St. Louis
Compare and see reviews for airlines that fly from Ireland to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom €125 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom €611 | Free Cancellation | Rating 7.1 9,678 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ireland to St. Louis?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ireland to St. Louis. momondo saves you time and could save you money on your trip.
Can I find flights from Ireland to St. Louis with flexible booking policies on momondo?
momondo does allow users to show only those flights to St. Louis from Ireland which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Ireland to St. Louis?
momondo provides multiple filters to help you find the best flight to St. Louis from Ireland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ireland to St. Louis right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ireland to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.