Which airlines fly to St. Louis?

When flying to St. Louis from Ireland, momondo travellers will most often fly with one of these popular airlines: American Airlines or United Airlines. Depending on what airport in Ireland you fly from, you may be able to find flights with any of these popular airlines.

American Airlines Flights to St. Louis

American Airlines will jet to St. Louis around 32 times in an average week. Where you fly from will dictate what kind of deals you can get for American Airlines, but prices as low as €128 have been found from Dublin to St. Louis. American Airlines has scored 7.2/10 in momondo user reviews.

€375 Cheap Flights to St. Louis in 2025/26

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Find the cheapest flights from Ireland to St. Louis

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One-way

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12:30 - 21:02DUB-STL

38h 32m2 stops

13:57 - 11:45STL-DUB

39h 48m2 stops

€566Scandinavian Airlines

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Thu, 4 Dec - Mon, 8 Dec

12:30 - 21:02DUB-STL

38h 32m2 stops

13:57 - 11:45STL-DUB

39h 48m2 stops

€595Scandinavian Airlines

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Thu, 4 Dec - Mon, 8 Dec

10:00 - 21:44DUB-STL

17h 44m2 stops

11:18 - 11:15STL-DUB

18h 57m2 stops

€724Aer Lingus

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Sat, 7 Mar - Tue, 17 Mar

12:00 - 23:24DUB-STL

17h 24m2 stops

11:14 - 14:50STL-DUB

21h 36m2 stops

€737Aer Lingus

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Sat, 25 Apr - Sat, 2 May

18:05 - 23:57DUB-STL

35h 52m2 stops

15:43 - 09:00STL-DUB

11h 17m1 stop

€770Multiple Airlines

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Wed, 19 Nov - Sun, 23 Nov

05:10 - 13:55DUB-STL

14h 45m1 stop

11:41 - 07:30STL-DUB

13h 49m1 stop

€773Multiple Airlines

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Wed, 19 Nov - Sun, 23 Nov

09:00 - 15:29DUB-STL

12h 29m1 stop

10:00 - 08:10STL-DUB

16h 10m1 stop

€802United Airlines

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Sat, 29 Nov - Wed, 10 Dec

09:00 - 15:29DUB-STL

12h 29m1 stop

17:40 - 09:55STL-DUB

11h 15m1 stop

€803United Airlines

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Fri, 6 Mar - Sun, 15 Mar

11:30 - 19:30DUB-STL

14h 00m2 stops

10:56 - 08:40STL-DUB

15h 44m1 stop

€810American Airlines

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Thu, 4 Dec - Mon, 8 Dec

11:30 - 09:32DUB-STL

28h 02m2 stops

17:40 - 17:00STL-DUB

17h 20m2 stops

€817American Airlines

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Tue, 2 Dec - Wed, 10 Dec

Fly from

Route

Depart

Return

Price

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

12:30-21:02

2 stops38h 32m

Lambert-St Louis

Mon 8/12

13:57-11:45

2 stops39h 48m

€566

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

12:30-21:02

2 stops38h 32m

Lambert-St Louis

Mon 8/12

13:57-11:45

2 stops39h 48m

€595

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 7/3

10:00-21:44

2 stops17h 44m

Lambert-St Louis

Tue 17/3

11:18-11:15

2 stops18h 57m

€724

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 25/4

12:00-23:24

2 stops17h 24m

Lambert-St Louis

Sat 2/5

11:14-14:50

2 stops21h 36m

€737

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 19/11

18:05-23:57

2 stops35h 52m

Lambert-St Louis

Sun 23/11

15:43-09:00

1 stop11h 17m

€770

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 19/11

05:10-13:55

1 stop14h 45m

Lambert-St Louis

Sun 23/11

11:41-07:30

1 stop13h 49m

€773

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 29/11

09:00-15:29

1 stop12h 29m

Lambert-St Louis

Wed 10/12

10:00-08:10

1 stop16h 10m

€802

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 6/3

09:00-15:29

1 stop12h 29m

Lambert-St Louis

Sun 15/3

17:40-09:55

1 stop11h 15m

€803

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

11:30-19:30

2 stops14h 00m

Lambert-St Louis

Mon 8/12

10:56-08:40

1 stop15h 44m

€810

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 2/12

11:30-09:32

2 stops28h 02m

Lambert-St Louis

Wed 10/12

17:40-17:00

2 stops17h 20m

€817

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 August. Flight prices, which tend to average around €714, 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 €737.

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 €741. 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 €922.

What is the cheapest time of day to depart on your flight to St. Louis?

At midday is the cheapest time of day to fly from Ireland to St. Louis when you can find flight prices for as low as €693. Flying to St. Louis at midday is an ideal time because this is during off-peak travel hours. Flights in the morning are often more expensive, with an average ticket price of €851.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport

Find flights from Dublin to St. Louis

CHEAPEST MONTH TO FLY TO ST. LOUIS FROM DUBLIN	August	16% cheaper	Flying from Dublin to St. Louis costs on average just €714 in August
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM DUBLIN	July	17% more expensive	It costs about €986 for flights to St. Louis from Dublin in July
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM DUBLIN	September	325% more users visited	More momondo users searched in flights to St. Louis from Dublin in September 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	€375
Best Round-Trip Price	€566
Fastest flight time	12h 23m
Popular in	July

The best one-way flight price to St. Louis from Ireland in the last 72 hours is €375 (Dublin to Lambert-St Louis).

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The best round-trip flight price to St. Louis from Ireland in the last 72 hours is €566 (Dublin to Lambert-St Louis).

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The fastest flight to St. Louis from Ireland takes 12h 23m (Dublin to Lambert-St Louis).

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July has the highest demand for flights to St. Louis, with a 1% price increase on average.

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Frequently asked questions about flying to St. Louis

Is there an alternative airport near St. Louis?

Belleville Airport, Marion Williamson County Airport or Springfield Capital Airport can be an alternative airport used for travel 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 17h 44m 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 November 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.