Cheap flights from St. Louis to Rome from $254
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Rome departing on 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from St. Louis to Rome
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between St. Louis and Rome?
What is the cheapest month to fly to Rome?
The cheapest month to fly to Rome from St. Louis is in February. Flight prices, which tend to average around $737, are often lower during this time because this is during the off-season. If you aren’t able to travel to Rome during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $746.
What is the cheapest day to depart on your flight to Rome?
The cheapest day to depart on your flight to Rome is on a Wednesday when prices can be found for as low as $1,109. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Rome on Sunday is $1,335.
What is the cheapest time of day to depart on your flight to Rome?
In the afternoon is the cheapest time of day to fly from St. Louis to Rome when you can find flight prices for as low as $1,209. Flying to Rome in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Rome are more costly in the evening, with an average ticket price of $1,328. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Rome?
You are more likely to see cheaper flights to Rome from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Rome for around $1,061 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rome from St. Louis for as low as $851 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Rome?
United Airlines, Air Canada, and KLM are the most popular carriers operating from Lambert-St Louis to Rome
What airlines fly to Rome?
American Airlines, United Airlines and Air Canada are the top three most popular airlines that fly to Rome from St. Louis according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Rome. Keep in mind that there are 8 different airlines that fly to Rome on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Rome
Cheap St. Louis to Rome (STL to ROM) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Rome
How far is Lambert-St Louis to Rome by plane?
A flight from Lambert-St Louis to Rome will travel around 5053.3 mi. Typically, this will take 11h 16m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Rome?
Prices for flights from Lambert-St Louis Airport to Rome were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Rome?
As of July 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Rome.
How old do you have to be to fly from Lambert-St Louis Airport to Rome?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Rome.
What documentation or ID do you need to fly to Rome?
The necessary travel and health documents for your Rome trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Rome?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Rome is United Airlines (33% of total bookings). The next most popular airlines are American Airlines (17%), Air Canada (14%), and Delta (13%).
Best airlines flying from St. Louis to Rome
Compare and see reviews for airlines that fly from St. Louis to Rome with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $670 | Free Cancellation | Rating 8.0 7,982 reviews | |||
| PriceFrom $675 | Free Cancellation | Rating 6.8 7,207 reviews | |||
| PriceFrom $687 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $708 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom $713 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $739 | Free Cancellation | Rating 7.0 2,820 reviews | |||
| PriceFrom $784 | Free Cancellation | Rating 7.1 9,681 reviews | |||
| PriceFrom $800 | Free Cancellation | Rating 7.8 1,367 reviews |
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Why should I use momondo to find a flight deal from St. Louis to Rome?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Rome. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from St. Louis to Rome with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Rome from St. Louis with this policy.
How can momondo help me find flights from St. Louis to Rome?
Once all potential St. Louis to Rome flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to Rome right now. Can momondo alert me if prices change?
If you are not ready to book a flight from St. Louis to Rome now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Rome and let you know when they change.