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St. Louis

Cheap flights from Southampton (SOU) to St. Louis (STL)

SOU — STL
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Southampton to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 30, 2025.

Popular in

December

Cheapest in

March

Average price

$1,170
Highest demand for flights based on searches. 3% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Best time to book a flight from Southampton to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Southampton with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Currently, August is the cheapest month in which you can book a flight from Southampton to St. Louis (average of $311). Flying from Southampton to St. Louis in March is currently the most expensive (average of $356). 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.

Related info for your journey

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southampton 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 Southampton to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Southampton to St. Louis (average of $311). Flying from Southampton to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

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