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$268+ Cheap flights from St. Louis (STL) to Rome (ROM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ROM
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Rome are usually found in November or February, booked 87 days in advance, depart on a Wednesday or Friday and return on a Wednesday

Cheap flight deals from St. Louis to Rome

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Rome (ROM). 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 August 20, 2025.

Round-trip from

$582
(United Airlines)

One-way from

$268
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$811
From Lambert-St Louis to Rome (ROM)
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One-way flight from Lambert-St Louis to Rome (ROM)
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Highest demand for flights based on searches. 25% potential increase in price ($358 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to Rome

Cheapest flights from St. Louis to Rome
Explore the most affordable flight options available from St. Louis to Rome. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/21:00 pmSTL - FCO
1 stop11h 45mUnited Airlines
Fri 12/1212:50 pmFCO - STL
2 stops32h 35mUnited Airlines
Deal found 8/18$582
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/295:24 pmSTL - FCO
1 stop31h 21mUnited Airlines
Fri 12/1212:50 pmFCO - STL
2 stops33h 50mUnited Airlines
Deal found 8/18$587
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:00 amSTL - FCO
1 stop16h 45mUnited Airlines
Tue 12/912:45 pmFCO - STL
2 stops33h 55mUnited Airlines
Deal found 8/18$589
This Air Canada deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/294:05 pmSTL - FCO
2 stops33h 50mAir Canada
Tue 12/912:45 pmFCO - STL
2 stops33h 55mAir Canada
Deal found 8/18$591
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/295:24 pmSTL - FCO
1 stop31h 21mUnited Airlines
Tue 12/912:45 pmFCO - STL
2 stops33h 55mUnited Airlines
Deal found 8/18$594
This United deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:00 amSTL - FCO
1 stop14h 45mMultiple Airlines
Fri 12/127:05 amFCO - STL
1 stop13h 50mMultiple Airlines
Deal found 8/18$598
This Ovago deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/910:45 amSTL - FCO
1 stop15h 15mBritish Airways
Fri 11/211:10 pmFCO - STL
1 stop14h 45mBritish Airways
Deal found 8/18$600
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/310:00 amSTL - FCO
2 stops15h 30mUnited Airlines
Wed 12/107:05 amFCO - STL
1 stop13h 50mUnited Airlines
Deal found 8/18$603
This Air Canada deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/14:05 pmSTL - FCO
1 stop12h 00mAir Canada
Tue 12/912:45 pmFCO - STL
1 stop33h 44mAir Canada
Deal found 8/18$604
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3010:00 amSTL - FCO
1 stop14h 45mUnited Airlines
Tue 12/99:45 amFCO - STL
1 stop20h 00mUnited Airlines
Deal found 8/18$605
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/295:24 pmSTL - FCO
1 stop31h 21mUnited Airlines
Wed 12/107:05 amFCO - STL
1 stop13h 50mUnited Airlines
Deal found 8/18$609
This American Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:00 amSTL - FCO
1 stop20h 00mAmerican Airlines
Fri 11/211:10 pmFCO - STL
2 stops17h 55mAmerican Airlines
Deal found 8/19$610

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Rome that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from St. Louis to Rome that are best for you.

Fly from

St. Louis

Fly to

Rome

Route

Depart

Return

Price

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/30

6:30 am-7:45 am

1 stop18h 15m

Rome Fiumicino

Fri 12/12

12:50 pm-2:25 pm

2 stops32h 35m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

6:42 pm-9:25 am

2 stops31h 43m

Rome Fiumicino

Fri 12/12

12:50 pm-9:40 pm

2 stops39h 50m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 12/1

6:30 am-7:45 am

1 stop18h 15m

Rome Fiumicino

Wed 12/10

12:50 pm-3:40 pm

2 stops33h 50m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 12/1

10:00 am-7:45 am

1 stop14h 45m

Rome Fiumicino

Fri 12/12

12:50 pm-2:25 pm

2 stops32h 35m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/30

6:30 am-7:45 am

1 stop18h 15m

Rome Fiumicino

Wed 12/10

12:50 pm-3:40 pm

2 stops33h 50m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/9

6:30 am-8:55 am

2 stops19h 25m

Rome Fiumicino

Fri 11/21

1:15 pm-10:45 pm

2 stops40h 30m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

6:30 am-7:45 am

1 stop18h 15m

Rome Fiumicino

Wed 12/10

12:50 pm-2:23 pm

2 stops32h 33m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

1:00 pm-7:45 am

1 stop11h 45m

Rome Fiumicino

Fri 12/12

12:50 pm-2:25 pm

2 stops32h 35m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 11/29

5:24 pm-8:55 am

2 stops32h 31m

Rome Fiumicino

Wed 12/10

12:50 pm-12:15 pm

2 stops30h 25m

$587

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

6:42 pm-9:25 am

2 stops31h 43m

Rome Fiumicino

Wed 12/10

12:50 pm-12:15 pm

2 stops30h 25m

$587

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 26 results
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Best time to book a flight from St. Louis to Rome

Have a flexible travel schedule? Discover the best time to fly to Rome from St. Louis 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 St. Louis to Rome

How far ahead should I book a flight from St. Louis to Rome?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Rome. Price data was last updated on August 8, 2025.

The best time to book flights from St. Louis to Rome is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Rome (average of $644). Flying from St. Louis to Rome in June is currently the most expensive (average of $1,136). 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 STL to ROM?

Find hourly flight availability from St. Louis to Rome. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

When flying from St. Louis to Rome, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 9% versus a flight in the evening.

How much does it cost to fly round-trip from St. Louis to Rome?

Reviews of airlines servicing Rome

Get insights into the airlines that provide service to Rome. 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 Rome. Reviews last updated August 20, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from St. Louis to Rome. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,928 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Iberia
7.0
Good
2,887 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Rome. 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 from for flights from St. Louis to Rome?

    If you book a flight to Rome from St. Louis, you will be flying from 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. There are 0 flights from Lambert-St Louis to Rome per day from 8 different airlines.

  • How long is the flight from St. Louis to Rome?

    United Airlines can get you from St. Louis to Rome in just under 18h 15m. Your travel time can differ by up to . The distance from St. Louis to Rome is about 5050 mi.

  • What are the cheapest airlines flying from St. Louis to Rome round-trip?

    According to our current data, Iberia ($536), United Airlines ($559), and Delta ($587) offers the cheapest pricing from St. Louis to Rome. You may be able to fly from St. Louis to Rome for 49% less than the average price by searching for these airlines.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Rome (average of $644). Flying from St. Louis to Rome in June is currently the most expensive (average of $1,136). 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 Rome?

Book flights to Rome if you plan to visit one of these locations
Fiumicino
Gaeta
Montepulciano
Santa Marinella

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from St. Louis to Rome

Discover the top 8 airlines that operate flights from St. Louis to Rome. 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 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$536Average$1,129FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$559Average$1,146FlexibilityNo cancel feeOn-time69%
DeltaCheapest$587Average$939FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$664Average$1,082FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$665Average$957FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$675Average$1,074FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$705Average$1,156FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$708Average$1,213FlexibilityNo cancel feeOn-time70%

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