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Cheap flights from Ireland to St. Louis

DUB — STL
3 Sep — 10 Sep1
1 adult

Cheap flight deals from Ireland to St. Louis

Keep the following information in mind while searching for Ireland to St. Louis flight deals. Data was last updated 29 August 2025.

Popular in

July

Cheapest in

August

Average price

£608
Highest demand for flights based on searches. 4% potential increase in price (£22 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Cheapflights Insights

Everything you need to know about your flight from Ireland to St. Louis

What is the cheapest month to book a flight from Ireland to St. Louis?

Currently, February is the cheapest month in which you can book a flight from Ireland to St. Louis (average of £722). Flying from Ireland to St. Louis in December is currently the most expensive (average of £1,033). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IE to STL?

Find hourly flight availability from Ireland to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 August 2025.

When flying from Ireland to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated 29 August 2025.
Read through reviews of airlines operating flights from Ireland to St. Louis, such as United Airlines, Aer Lingus, andIberia. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,941 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,941 reviews
United Airlines
7.4
Good
8,941 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Aer Lingus
7.2
Good
1,240 reviews
United Airlines
7.4
Good
8,941 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Iberia
7.0
Good
2,894 reviews
United Airlines
7.4
Good
8,941 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Lufthansa
6.8
Okay
7,371 reviews
United Airlines
7.4
Good
8,941 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

Related info for your journey

Find useful and relevant information for your journey from Ireland to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Ireland?

    If you book a flight to St. Louis from Ireland, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • Can I find deals for flights from Ireland to St. Louis that include hotel bookings?

    Yes. In addition to deals on Ireland to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ireland to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to St. Louis.

  • Can I find deals for business class flights from Ireland to St. Louis?

    Yes. Cheapflights offers flight deals from Ireland to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to St. Louis?

    Currently, February is the cheapest month in which you can book a flight from Ireland to St. Louis (average of £722). Flying from Ireland to St. Louis in December is currently the most expensive (average of £1,033). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ireland to St. Louis

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Top 4 airlines flying from Ireland to St. Louis

Discover the top 4 airlines that operate flights from Ireland to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 29 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£461Average£699FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IberiaCheapest£594Average£650FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£624Average£659FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£645Average£702FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ireland to St. Louis?

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Why should you use Cheapflights to find cheap flight tickets from Ireland to St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from Ireland to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ireland to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ireland to St. Louis flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ireland to St. Louis become cheaper?

Yes! Start tracking prices for Ireland to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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