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Find cheap flights from St. Louis to Portugal from $404

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 Portugal departing on 11/3. 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
0 bags
Mon 7/1
Mon 7/8

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Best Portugal Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Lisbon
Lisbon1 stop$533
Porto
Porto2 stops$866
Lajes
Lajes3 stops$1,475

Good to know

Low season

January

High season

September

Cheapest flight

$404
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from St. Louis to Lisbon

FAQs - booking Portugal flights

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

    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 Portugal.

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

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

    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 Portugal 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 Portugal?

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

See more FAQs

Top tips for finding cheap flights to Portugal

  • Morning departure is around 5% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from St. Louis to Portugal

 
Need help choosing which airline to fly with from St. Louis to Portugal? 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.
7.4
United AirlinesOverall score based on 10754 reviews
7.7Boarding
6.7Food
8.1Crew
7.1Entertainment
7.2Comfort
Airline reviews

Not worth the premium paid for the first class ticket

6.0 GoodMohamud R, Jun 2024DEN - YVR
Read more about United Airlines reviews

Not worth the premium paid for the first class ticket

Not worth the price of premium class ticket paid, felt more like steerage.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

I flew Delta last week and United Airlines is a poor substitute mechanical problems with the plane and shitty food among other things made my travel experience what’s become to be expected from United no way is it ever worth the money they make us pay

I had a great flight. Everything went smoothly and the flight arrived early.

Well....let's start from the point that I had to stay in airport for 12 hours instead of 2 that was scheduled. Poor company and even worst customer service. Never again....

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

They cancelled two flight and got us onto another airline, which was also delayed.

Nothing, terrible travel experience due to weather and maintenance delays and was left stranded in Austin.

Missed connection from Philadelphia to London because flight from DC was seriously delayed. Was re-routed the next day (had to pay for hotel) to Zurich and was given a main cabin middle seat while I had paid for premium. Great job AA!!!

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

28 hour delay at Fort Worth/Dallas airport, part due to weather which was unavoidable, but various other reasons - no pilot, no fa, mechanical problem, plane too small, too big, crew out of flying time, seat configuration problems.... endless and hourly updates with a different excuse. Finally told us about 3.00 am, that the flight was delayed to hours later.

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

very very tight seats unfriendly crew who do not seem to care about the comfort of their passengers and do not know how to smile poor ground staff support at LHR and PHX

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

My flight was cancelled after a 7 hour delay. I am awaiting a refund.

Ability to select seating would be nice. We were family of three and they had us seated back to back and one of us on the other side of the plane??? That is pretty goofy. Especially when tickets were placed two months in advance.

We had a seat that would not function. No Wifi or inflight entertainment was available. Food was very poor. Attendants were very accommodating and apologized for the problems.

They offered several meals and snacks, the crew was very friendly and kind. There was a broad selection of movies, shows, and games. I was impressed!

I am quite satisfied. The flight was on time and landed early. Staff was friendly.

Needed more info on connecting flight. Late flight made very short connection. Lost luggage that we still do not have!

Seats comfortable on economy plus and attendants very helpful. Food was ok. Bathrooms needed servicing.

Original flight was cancelled - After waiting 2 hours for new take-off times. Then had to stand in line for 3 hours, ending at 2:30 am - to be told, " No hotel rooms anywhere in Dallas". No way for me to get any rest at DFW at that time of night.

I liked the friendly crew and desk staff, all very helpful. I was surprised and a little annoyed on my outbound flight from LGW to MCO as I had prepaid and booked my seat, which was all correct at check in on my boarding pass. when I got on the plane someone was in my seat ! I was moved to another seat. The food choice is quite limited and I feel that an option of a muffin for breakfast snack would be welcomed, not everyone wants egg or bacon wrap. The choice of entertainment is good, plenty to keep you busy on a long haul flight. I liked the option offered to have the cabin bag checked into the hold, it saved me as an older, lone traveller lifting my case into the overhead locker or finding there was no space.

My luggage did not get to my Miami destination/home. I am waiting for it 24 hours later.

My seat was moved multiple times. I picked out the perfect seats beforehand. I even paid extra money for them. However, I was moved to a middle seat without warning at the last minute. It was like my worst nightmare. But other than that, the actual flight was good. Everything was on time or even early and the flight was smooth.

A220 plane had 5 seats across which is great for couples who can snag the A&C seats. Seat itself is borderline comfortable but still tough on a 5+ hour flight. Overhead bins are small so if you're not in at least boarding group 5, you could be in trouble. No included food service. Non-alcoholic drinks are free but even the most basic snacks are for a charge. Price was reasonable for the only direct SEA-YUL flight. Boarding is efficient even managing passport checks. Worth flying for the direct flight.

The original flight from Boston to Toronto was canceled because of a mechanical failure. I was then scheduled on a flight to go from Boston to Montreal and then Montreal to Toronto. The flight was extremely full and I had to check my carry-on bag. When I actually got on the plane there appeared to be room for my bag. I understand the mechanical failures happen. But it was frustrating that they pestered me to check my bag when I don't believe it was necessary. Additionally, not just with Air Canada, modern airline seats are incredibly uncomfortable. There is considerable research that shows that the shape of them is poor for back health.

Unable to initiate refund/reschedule the ticket #worst experience #lost 900$

Flight was delayed for almost 3 hours. Communication of gate change was poor. Email and screen said one gate and it was a different gate from that. Gate changed first to 64 B and then to 64 C. Originally it was 68B. 64C was not communicated properly!

Much better than previous experiences. Overall, it went smoothly after an unexpected delay and gate change.

This was a red eye return, so I doubt there would be anyway to make it better. Other than adding beds.

Direct nonstop flight was great. Flight was delayed and the crew announced a 2h delay on the sound system. 30 min or so later I hear my name on the sound system for immediate board. Several other passangers were late too. Reason: The crew incorrectly announced a 2h delay when in reality they meant a new boarding time at 2pm.

Plenty of room in the exit row. Sat on the plane an hour before taking off.☹️ Landed late and had to wait for gate availability.

Flight was on time early arrival better entertainment good staff.everything was excellent

Poor, we had 1 hour to grab our checked luggage, go through customs, recheck bags and run across terminals to make our United flight. Poorly planned connections.

Check in in Albuquerque was awful. The people were great but they were over loaded. The procedures were terrible. We got through fine but it took 90+ minutes.

Will try to not fly with them again. Delays because of weather but got redirected to an airport where I could not make connection.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

Boston Logan is a crummy airport - signage is terrible or lacking in areas. Boarding seemed to be a free for all and with all the different airlines speaking, you couldn't tell who was supposed to be where and when. Plain and simple, airlines should board from the back of the plane to the front. Also someone was sitting in my seat. By the time that was figured out, I had to place my overhead behind me which made de-planing more difficult. Logan is not Lufthansa's fault so that is not on them, Boarding is on them! Still, overall it was a Good Experience flying with Lufthansa. This is not my first flight with them...

Overall, the flight was comfortable without any serious issues. Transit through Frankfurt airport was a little confusing, but not too difficult if you follow the signs

There was a screaming child behind our seats. This prevented us from getting any sleep during the night.

There was a screaming child just behind our seats. This prevented us from getting any sleep during the night!!

Staff disappeared after dinner service until breakfast, no help with beds, no help running to our gate to catch connection cause flight was late, our luggage didn’t make it, took over 24 hours to get luggage to hotel, no compensation!!

Everything was good except food. I believe there is room for improvement

Book cheap flights from St. Louis to Portugal

Recent round-trip flight deals

11/2Sat
1 stop
33h 30mSTL-LIS
11/13Wed
1 stop
14h 55mLIS-STL
$533
11/2Sat
2 stopsBritish Airways
34h 31mSTL-LIS
11/13Wed
2 stopsBritish Airways
20h 31mLIS-STL
$580
11/2Sat
1 stopAmerican Airlines
16h 21mSTL-LIS
11/13Wed
2 stopsAmerican Airlines
22h 36mLIS-STL
$618
11/3Sun
1 stopLufthansa
17h 05mSTL-LIS
11/9Sat
1 stopLufthansa
31h 40mLIS-STL
$702
11/3Sun
2 stopsLufthansa
23h 53mSTL-LIS
11/9Sat
1 stopLufthansa
31h 40mLIS-STL
$719
10/8Tue
1 stopAir Canada
15h 20mSTL-LIS
10/30Wed
1 stopAir Canada
27h 53mLIS-STL
$723
10/8Tue
2 stopsAmerican Airlines
15h 00mSTL-LIS
10/30Wed
1 stopAmerican Airlines
29h 35mLIS-STL
$730
8/12Mon
1 stopAir Canada
15h 20mSTL-LIS
8/22Thu
1 stopAir Canada
15h 40mLIS-STL
$746
10/2Wed
2 stopsUnited Airlines
18h 30mSTL-LIS
10/12Sat
1 stopUnited Airlines
36h 00mLIS-STL
$814
7/3Wed
2 stopsUnited Airlines
18h 51mSTL-LIS
7/11Thu
1 stopUnited Airlines
15h 40mLIS-STL
$915

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Recent one-way flight deals

11/3Sun
1 stopLufthansa
13h 30mSTL-LIS
$404
11/3Sun
2 stopsLufthansa
23h 53mSTL-LIS
$408
8/3Sat
2 stops
45h 37mSTL-LIS
$422
7/4Thu
2 stops
43h 21mSTL-OPO
$453
7/4Thu
3 stops
53h 46mSTL-OPO
$462
11/3Sun
2 stopsUnited Airlines
15h 00mSTL-LIS
$482
7/3Wed
2 stops
43h 51mSTL-LIS
$484
11/3Sun
3 stops
26h 05mSTL-LIS
$491
7/22Mon
2 stopsUnited Airlines
18h 47mSTL-OPO
$529
6/28Fri
2 stopsTurkish Airlines
46h 20mSTL-LIS
$3,566

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Last minute flights from St. Louis to Portugal

Last minute flight, train and bus deals

6/6Thu
multi-stopDelta
19h 49mSTL-LIS
6/15Sat
multi-stopDelta
21h 37mLIS-STL
$1,044
6/3Mon
multi-stop
22h 45mSTL-LIS
6/5Wed
multi-stop
40h 58mLIS-STL
$1,196
6/3Mon
multi-stop
18h 10mSTL-LIS
6/5Wed
multi-stop
40h 58mLIS-STL
$1,301
6/3Mon
multi-stop
22h 45mSTL-LIS
6/5Wed
multi-stop
18h 50mLIS-STL
$1,344
6/3Mon
multi-stop
18h 10mSTL-LIS
6/5Wed
multi-stop
18h 50mLIS-STL
$1,452
6/6Thu
multi-stopAir Canada
17h 30mSTL-LIS
6/15Sat
multi-stopAir Canada
32h 31mLIS-STL
$1,508
6/6Thu
multi-stopLufthansa
15h 30mSTL-LIS
6/15Sat
multi-stopLufthansa
31h 15mLIS-STL
$1,767
6/3Mon
multi-stop
15h 40mSTL-LIS
6/5Wed
multi-stop
15h 40mLIS-STL
$1,899
6/4Tue
multi-stopTurkish Airlines
41h 05mSTL-LIS
6/6Thu
multi-stopTurkish Airlines
28h 49mLIS-STL
$6,975
6/4Tue
multi-stopLufthansa
15h 30mSTL-LIS
6/6Thu
multi-stopLufthansa
17h 19mLIS-STL
$7,871

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St. Louis - Portugal Flights

Departure:

St. Louis (STL)United States

Return flight deals:

Portugal - St. Louis

Cabin classes: