€399 Cheap flights to St. Louis
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to St. Louis departing on 22/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Ireland to St. Louis
Cheap return flights
Cheap one-way flights
See travel insights to St. Louis from
St. Louis flights insights and trends
Explore insights for your St. Louis flight to craft the best travel plan
What is the cheapest month to fly to St. Louis?
The cheapest month to fly to St. Louis from Ireland is in February. Flight prices, which tend to average around €733, are often lower during this time because this is during the off-season. The month of November is another great option to travel to St. Louis, with average flight prices from Ireland averaging around €744.
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 €748. 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 €931.
Cheapest flights to Lambert-St Louis
Find the cheapest flights to Lambert-St Louis from your nearest city or airport
| CHEAPEST MONTH TO FLY TO ST. LOUIS FROM DUBLIN | February | 11% cheaper | Flying from Dublin to St. Louis costs on average just €733 in February |
| MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM DUBLIN | July | 12% more expensive | It costs about €922 for flights to St. Louis from Dublin in July |
| MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM DUBLIN | July | 416% more users visited | More momondo users searched in flights to St. Louis from Dublin in July than any other month |
Cheap St. Louis flight deals and tips
Summary info about St. Louis flight prices, duration and airlines
Best One-Way Price | €399 |
|---|---|
Best Round-Trip Price | €663 |
Fastest flight time | 10h 12m |
Popular in | July |
Frequently asked questions about flying to St. Louis
How long does it take to fly to St. Louis?
If you’re flying from a popular airport in Ireland, such as Dublin or Cork, and flying into St. Louis, then you can expect flight times to average 12h 38m and , respectively.
When did momondo last update prices for flights to Lambert-St Louis Airport?
Prices for flights to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights to Lambert-St Louis Airport?
The number of operators available for flights to Lambert-St Louis Airport is 2 as of April 2025.
How old do you have to be to fly to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Why use momondo?
Why should I use momondo to find a flight deal to St. Louis?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis.
Can I find flights to St. Louis with flexible booking policies on momondo?
Flights to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights to St. Louis?
Once all potential St. Louis flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times, amongst many other options.
I’m not ready to book a flight to St. Louis right now. Can momondo alert me if prices change?
Price alerts on flights to 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.
Get notified when prices go down
Daily price changes in your inbox - only with Price Alerts.
Find better results for your trip to St. Louis
Popular Flights to St. Louis
Popular routes according to searches in the past day on momondo
Cheapest flight routes to Lambert-St Louis
These routes have the cheapest flights to Lambert-St Louis found by momondo users in Ireland
| Departing | Destination | Best Time | Best Price |
|---|---|---|---|
| Dublin | St. Louis | 12h 38m | €542 |