STL - FCO

$278 Find Cheap Flights from St. Louis to Rome Fiumicino Airport

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 10/4. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Rome Fiumicino Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Rome.
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 Fiumicino (STL-FCO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Fiumicino 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

Mon, Oct 20 - Wed, Nov 5
United Airlines Logo
3:23 pm - 1:05 pmSTL-FCO
14h 42m2 stops
United Airlines Logo
7:05 am - 1:55 pmFCO-STL
13h 50m1 stop
$532United Airlines
Find Deal
Mon, Oct 20 - Wed, Nov 5
United Airlines Logo
9:20 am - 8:15 amSTL-FCO
15h 55m2 stops
United Airlines Logo
7:05 am - 5:39 pmFCO-STL
17h 34m2 stops
$534United Airlines
Find Deal
Mon, Oct 20 - Wed, Nov 5
Delta Logo
3:59 pm - 11:05 amSTL-FCO
12h 06m1 stop
Delta Logo
9:20 am - 8:13 amFCO-STL
29h 53m1 stop
$568Delta
Find Deal
Sun, Nov 9 - Fri, Nov 21
KLM Logo
9:21 am - 10:30 amSTL-FCO
18h 09m1 stop
KLM Logo
9:20 am - 4:33 pmFCO-STL
14h 13m1 stop
$575KLM
Find Deal
Mon, Nov 10 - Tue, Nov 18
Air Canada Logo
4:05 pm - 8:55 amSTL-FCO
57h 50m2 stops
Air Canada Logo
7:05 am - 3:29 pmFCO-STL
39h 24m2 stops
$577Air Canada
Find Deal
Thu, Dec 4 - Tue, Dec 9
Air Canada Logo
4:05 pm - 9:25 amSTL-FCO
34h 20m2 stops
Air Canada Logo
12:45 pm - 3:40 pmFCO-STL
33h 55m2 stops
$611Air Canada
Find Deal
Sat, Dec 13 - Tue, Dec 23
American Airlines Logo
6:00 am - 9:00 amSTL-FCO
20h 00m1 stop
American Airlines Logo
1:10 pm - 8:56 amFCO-STL
26h 46m1 stop
$631American Airlines
Find Deal
Tue, Oct 7 - Thu, Oct 16
American Airlines Logo
9:43 am - 8:05 amSTL-FCO
15h 22m1 stop
American Airlines Logo
12:10 pm - 11:58 pmFCO-STL
18h 48m1 stop
$665American Airlines
Find Deal
Wed, Oct 8 - Thu, Oct 16
Delta Logo
10:45 am - 10:05 amSTL-FCO
16h 20m2 stops
Delta Logo
9:45 am - 5:47 pmFCO-STL
15h 02m1 stop
$670Delta
Find Deal
Mon, Oct 13 - Fri, Oct 24
KLM Logo
10:45 am - 9:20 amSTL-FCO
15h 35m1 stop
KLM Logo
2:25 pm - 4:43 pmFCO-STL
33h 18m1 stop
$678KLM
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $532 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
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
$532
Typical prices: $721-1072
United Airlines
Mon 10/20Wed 11/5
STL - FCO • 2 stops
Cheapest one-way
$278
Typical prices: $517-717
Multiple Airlines
Sat 10/4
STL - FCO • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Rome!
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 Fiumicino Airport?

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

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

If you are looking for a flight deal from St. Louis to Rome Fiumicino Airport, look for departures on Tuesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Rome Fiumicino Airport, Thursday is the cheapest day to fly and Tuesday is the most expensive.

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

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 Fiumicino Airport, 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 Fiumicino Airport is January, where tickets cost $709 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,540 and $1,485 respectively.

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

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 Fiumicino Airport, 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 Fiumicino Airport, you should book around 4 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 seasonDecember
Cheapest flight$278
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from St. Louis to Rome Fiumicino Airport

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 St. Louis to Rome Fiumicino Airport flights

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

    In the last 3 days, the lowest price for a flight from St. Louis to Rome Fiumicino Airport was $278 for a one-way ticket and $532 for a round-trip.

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

    A passport is required to fly from St. Louis to Rome Fiumicino Airport.

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

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

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

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

  • 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 $929 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 $1,048 and an overall rating of 7.8.

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

    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 Fiumicino Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rome Fiumicino Airport 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 Fiumicino Airport?

    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 Fiumicino Airport with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and FCO can sometimes prove cheaper using this method.

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

    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 Fiumicino Airport from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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 7957 reviews
7.9Entertainment
7.9Comfort
8.5Crew
8.2Boarding
7.3Food
Airline reviews

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

8.0 ExcellentAnonymous, Sep 2025GFK - MSP
Read more Delta reviews

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Terrible. They wouldn't allow me on my flight on the 14th..

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Stop charging for alcohol overseas flights and start taking cash again not everyone wants to pay with card if the person is bigger give him seat on the outside seats not the middle in between the people is common sense and mainly if you fly for Lufthansa provides the sam service and experience...

good entertainment package but rather small seats for business class

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Booked Economy but it translated to economy light for Lufthansa so now we are stuck paying an extra $75 per person both ways for our checked bags. If I had known that, I would have never booked these tickets because it came out to be more than other options. The booking in the kayak side clearly says Economy and has a link to the inormation for Lufthansa which states Economy included a checked bag. Super annoyed about that.

The flight from Dulles to Munich was just okay. The seats were comfortable and extra foot room was noticeable in comfort plus. Disappointed in the booking in so much I requested an aisle seat and then was assigned a middle seat. The food was inedible. Movie choices were moderate. I usually fly Delta, but this WA flight was cheaper. Next time, I'll happily pay the extra to fly Delta.

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