STL - ROM

$255 Find Cheap Flights from St. Louis to Rome

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Rome departing on 1/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Rome.
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Flight Deals

Cheap Flights from St. Louis to Rome (STL-ROM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Rome that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Rome

Fri, Dec 5 - Fri, Dec 12
United Airlines Logo
1:00 pm - 7:45 amSTL-FCO
11h 45m1 stop
United Airlines Logo
1:10 pm - 2:25 pmFCO-STL
32h 15m2 stops
$483United Airlines
Find Deal
Tue, Jan 13 - Thu, Jan 22
United Airlines Logo
8:05 am - 9:25 amSTL-FCO
18h 20m2 stops
United Airlines Logo
12:50 pm - 2:30 pmFCO-STL
32h 40m2 stops
$490United Airlines
Find Deal
Tue, Jan 13 - Thu, Jan 22
Air Canada Logo
9:57 am - 9:25 amSTL-FCO
16h 28m2 stops
Air Canada Logo
12:50 pm - 3:29 pmFCO-STL
33h 39m1 stop
$503Air Canada
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Fri, Nov 28 - Fri, Dec 5
KLM Logo
11:04 am - 7:55 amSTL-FCO
13h 51m1 stop
KLM Logo
10:05 am - 5:56 pmFCO-STL
14h 51m1 stop
$506KLM
Find Deal
Fri, Nov 28 - Fri, Dec 5
KLM Logo
11:04 am - 7:55 amSTL-FCO
13h 51m1 stop
KLM Logo
6:10 am - 4:06 pmFCO-STL
16h 56m2 stops
$507KLM
Find Deal
Tue, Jan 13 - Thu, Jan 22
Delta Logo
5:56 pm - 10:45 pmSTL-FCO
21h 49m2 stops
Delta Logo
12:40 pm - 8:39 pmFCO-STL
14h 59m1 stop
$510Delta
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Tue, Jan 13 - Thu, Jan 22
Delta Logo
10:19 am - 11:45 amSTL-FCO
18h 26m2 stops
Delta Logo
6:10 am - 11:39 pmFCO-STL
24h 29m2 stops
$511Delta
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Mon, Jan 19 - Thu, Jan 29
Air Canada Logo
4:05 pm - 10:55 amSTL-FCO
11h 50m1 stop
Air Canada Logo
12:50 pm - 2:30 pmFCO-STL
32h 40m2 stops
$541Air Canada
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Wed, Dec 31 - Sun, Jan 11
Lufthansa Logo
6:35 pm - 11:00 pmSTL-FCO
21h 25m2 stops
Lufthansa Logo
7:05 pm - 11:59 pmFCO-STL
35h 54m2 stops
$562Lufthansa
Find Deal
Wed, Dec 31 - Wed, Jan 14
Lufthansa Logo
3:50 pm - 12:40 pmSTL-FCO
13h 50m1 stop
Lufthansa Logo
10:30 am - 11:59 pmFCO-STL
20h 29m1 stop
$581Lufthansa
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $483 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 31% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$483
Typical prices: $744-$868
United Airlines
Fri 12/5Fri 12/12
STL - FCO • 1 stop
Cheapest one-way
$255
Overall average: $540
Multiple Airlines
Sun 1/18
STL - FCO • 2 stops
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Booking Insights

KAYAK's insights & trends for St. Louis to Rome flights

Get data-powered insights and trends into flights from St. Louis to Rome to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Rome?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Rome departing in December.

What’s the cheapest day of the week to fly from St. Louis to Rome?

The average price of all round-trip flights from St. Louis to Rome clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Rome on a Tuesday and more expensive on a Sunday. On your return trip to St. Louis, you should consider flying back on a Thursday, and avoid Tuesdays for better deals.

What is the cheapest month to fly from St. Louis to Rome?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Rome, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Rome is November, where tickets cost $722 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,618 and $1,319 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Rome, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Rome, you should book around 2 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$255
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from St. Louis to Rome

When to book flights from St. Louis to Rome

Are your dates flexible? Find out the best times to travel from St. Louis to Rome based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Rome

  • How do I get from Fiumicino International Airport to the city center?

    You will have several options when traveling from the airport to Rome. You can board a train that is located next to the arrival terminal. You can utilize the free shuttles to take you to the train station or take a walk to burn a few calories. The train departs every 15 minutes, which will help you save time on your trip. Additionally, if traveling on a budget, you can book a bus station at ground level, a walking distance from the arrival terminal which will take you to the bus station in the city.

  • Can I bring a pet on Delta Airlines flights from St Louis to Rome?

    Yes, small dogs and cats are permitted to the cabin for a one-way fee collected at the check-in. The pet size must fit in the available pet carrier under the feet in front of you. If your pet is large and exceeds the required size, it will be shipped as exceptional cargo.

  • Which nearby cities can be accessed from Fiumicino International Airport?

    Many cities around Fiumicino Airport are approximately one hour drive. If you love adventure, you can drive to Lanuvio, Zagarolo, and Genzano cities to enjoy the beautiful scenery of Italy. If you have extra time to stay in Italy, visit Rocca Priora and Sancesareo cities for a more satisfying experience.

  • What is the baggage policy on flights from St Louis to Rome with Turkish Airlines?

    Passengers will be allowed to board with one piece of cabin baggage per passenger that measures 9 by 15 by 21 in size and 17.6 lbs. If you are traveling in the business class category, you can carry one personal item bag measuring 15 by 12 by 6 in size.

  • What is the cheapest flight from St. Louis to Rome?

    In the last 3 days, the lowest price for a flight from St. Louis to Rome was $255 for a one-way ticket and $483 for a round-trip.

  • Do I need a passport to fly between St. Louis and Rome?

    Yes, you’ll need a passport to travel to Rome from St. Louis.

  • Which airports will I be using when flying from St. Louis to Rome?

    On your way to Rome, you’ll fly out from Lambert-St Louis. You’ll be landing in one of Rome’s 2 airports: Rome Ciampino or Rome Fiumicino.

  • Which aircraft models fly most regularly from St. Louis to Rome?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Rome?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Rome, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Rome from St. Louis?

    Chicago is the most popular layover city among KAYAK users traveling from St. Louis to Rome.

  • Which is the best airline for flights from St. Louis to Rome, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from St. Louis to Rome are Delta and KLM. With an average price for the route of $1,070 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $869 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from St. Louis to Rome?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Rome.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Rome?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rome from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Rome?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Rome with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Rome?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Rome from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to Rome

  • Ciampino (CIA) and Fiumicino (FCO) airports are the main airports in Rome. Fleets from various regions worldwide, including those flying from Lambert St Louis International Airport, are landed at either of the airports. Airlines such as Delta, KLM, Lufthansa, West-Jet, and Turkish Airlines are operated between St Louis and Rome.
  • Flights flying from Lambert St Louis International Airport (STL) will land at Fiumicino Airport. You will find it easy to navigate at Ciampino Airport as it has just one terminal for arrivals and departures. If you travel internationally, you will land at Leonardo Da Vinci International Airport in Fiumicino, which has two operating terminals, and you will arrive at terminal three. On arrival, you can take an outdoor bus at the ground level a few meters from the arrival terminal, which will drop you at the central station in Rome.
  • Delta Airlines offers passengers economy, premium economy, and business class services. All travelers will be served coffee during their journey. If you travel in premium economy class, you will have improved dining options and legroom. Business class travelers will be provided noise-reducing headsets and skin care products.
  • Turkish Airlines' premium economy section will offer adjustable toy seats for kids and amenity kits, including earplugs, lip balm, and socks, as an incentive if you travel with kids. If you board the business class, you will be privileged to get in-chair massage functions and a reading lamp.
  • Lufthansa Airlines is among the airlines operating between St Louis and Rome that have taken measures to reduce carbon emissions. The airline is determined to half its carbon emissions by 2030. Additionally, the airline is determined to utilize sustainable aviation fuel (SAF) and more fuel-efficient aircraft to meet sustainable environmental conservation goals.

Reviews of the top 5 airlines serving from St. Louis to Rome

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Rome. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Rome? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7993 reviews
8.5Crew
7.9Comfort
7.3Food
7.9Entertainment
8.2Boarding
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Friendly and professional flight crew. Aside from departure delay after boarding, easy flight and smooth landing.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Allow me to book extra bag check in as free though I packed in 1 luggage but that was 7 LBS overweight so make another bag to free check in.

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

Boarding was so so after zone 3 was called all other zones went in

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

For goodness sake, board from the back of the plane to the front and assign overhead space. It would fix everything. Seriously.

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

It was a smooth flight both in the sky and landing!

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

The seats are so small that you can barely move at all. Don't try to eat with utensils in your seat either - you will elbow your neighbor in the face. Miserably small and I swear they are shrinking every time I fly. Food was meh (per usual), but at least there is free alcohol on an overseas flight. Doesn't make up for sitting in a torture chamber while hurtling through the air with hundreds of fussy people, but it's something. Entertainment options (movies, shows) are okay, nothing special, but at least there are screens, because most of the seats in these large planes do not have adjustable lighting - or air control - that you can get to, it's too high to reach - which makes reading impossible. Zero stars, AA.

Flight to get to Barcelona was cancelled and then the next flight was overbooked. Cancelled the entire trip and went elsewhere. Fighting with iberia to get my money back. Ill never book this carrier again!

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

The crew were friendly and helpful. Iberia lost our luggage on arrival, Friday and we didn't get it until Sunday at 10:00 p.m. local Malaga time. I also paid $382.80 for seat assignments but two out out of the four were not together. Iberia mentioned that it was because the plane was delayed in Madrid before our flight began in LAX. They should compensate us half of my payment.

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

It was hidden that I needed a special fee to bring my guitar on. They charged me an extra 69 euros at the gate and did not refund me the checked bag I paid for and the over head bag I paid for which I didn't use because I had to pay for the special guitar case. Criminal behavior. They were very unkind about it as well. Terrible experience. I'd like my money back for the extras I paid for.

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

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