Cheap flights from Portugal to St. Louis from $409
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to St. Louis departing on 5/16. 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 Portugal to St. Louis
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 cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Monday when prices can be found for as low as $898. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,021. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Portugal in the morning is the least expensive time of day to depart. momondo users have found prices as low as $898 when looking at flights departing in the morning. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $898 per ticket.
Cheap Portugal to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portugal to St. Louis
When did momondo last update prices for flights from Portugal to Lambert-St Louis Airport?
Prices for flights from Portugal to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Portugal to Lambert-St Louis Airport?
As of April 2025, there is 1 operator available to choose from for flights from Portugal to Lambert-St Louis Airport.
How old do you have to be to fly from Portugal to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portugal to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport 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.
Best airlines flying from Portugal to St. Louis
Compare and see reviews for airlines that fly from Portugal to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $820 | Free Cancellation | Rating 7.2 10,000 reviews |
Traveling to a place near St. Louis?
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Why should I use momondo to find a flight deal from Portugal to St. Louis?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portugal to St. Louis. momondo saves you time and could save you money on your trip.
Can I find flights from Portugal to St. Louis with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Portugal to St. Louis flights to just show those with flexible booking policies.
How can momondo help me find flights from Portugal to St. Louis?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Portugal.
I’m not ready to book a flight from Portugal to St. Louis right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to St. Louis from Portugal. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.