$170 Find Cheap Flights to Sines

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Sines departing on 9/15. 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

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Cheap Flights to Sines

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

Tue, Oct 28 - Thu, Nov 6
SWISS Logo
5:40 pm - 12:45 pmMIA-LIS
15h 05m2 stops
SWISS Logo
12:35 pm - 5:30 pmLIS-MIA
33h 55m1 stop
$175SWISS
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Sat, Nov 1 - Wed, Nov 12
SWISS Logo
10:00 pm - 2:35 pmJFK-LIS
12h 35m1 stop
SWISS Logo
12:15 pm - 1:05 pmLIS-JFK
29h 50m1 stop
$360SWISS
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Wed, Oct 29 - Wed, Nov 5
British Airways Logo
11:45 am - 8:55 amMIA-LIS
17h 10m1 stop
British Airways Logo
8:45 pm - 1:55 pmLIS-MIA
22h 10m1 stop
$368British Airways
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Tue, Oct 28 - Thu, Nov 6
British Airways Logo
2:20 pm - 9:05 amMIA-LIS
14h 45m1 stop
British Airways Logo
8:45 pm - 1:55 pmLIS-MIA
22h 10m1 stop
$374British Airways
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Mon, Nov 3 - Wed, Nov 26
Delta Logo
12:00 pm - 8:00 amMIA-LIS
15h 00m1 stop
Delta Logo
11:15 am - 11:31 pmLIS-MIA
17h 16m1 stop
$376Delta
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Wed, Oct 29 - Wed, Nov 12
Delta Logo
12:00 pm - 8:00 amMIA-LIS
16h 00m1 stop
Delta Logo
11:15 am - 11:31 pmLIS-MIA
17h 16m1 stop
$385Delta
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Mon, Oct 27 - Wed, Nov 19
TAP AIR PORTUGAL Logo
12:55 am - 11:40 amEWR-LIS
6h 45mnonstop
TAP AIR PORTUGAL Logo
6:45 pm - 10:10 pmLIS-EWR
8h 25mnonstop
$405TAP AIR PORTUGAL
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Wed, Nov 26 - Tue, Dec 2
TAP AIR PORTUGAL Logo
10:00 pm - 9:55 amJFK-LIS
6h 55mnonstop
TAP AIR PORTUGAL Logo
4:40 pm - 8:05 pmLIS-JFK
8h 25mnonstop
$405TAP AIR PORTUGAL
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Thu, Nov 20 - Thu, Nov 27
United Airlines Logo
10:35 am - 9:20 amLGA-LIS
17h 45m1 stop
United Airlines Logo
10:55 am - 2:11 pmLIS-LGA
32h 16m2 stops
$424United Airlines
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Tue, Nov 25 - Tue, Dec 2
United Airlines Logo
6:00 am - 10:15 amLGA-LIS
23h 15m1 stop
United Airlines Logo
11:20 am - 2:42 pmLIS-LGA
32h 22m1 stop
$426United Airlines
Find Deal
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Good to know - Book Cheap Sines Plane Tickets

Low seasonJanuary
Cheapest flight$170
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Newark Liberty Airport to Lisbon

Flights to Sines: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew to Sines 
FlorenceFlew with TAP AIR PORTUGALEWR-LISDec 2024
Both flights needed a bus from terminal to plane and plane to terminal. The transfer to the connecting flight at Lisbon was quick and easy with luggage checked thru to Venice.
Jose AntonioFlew with TAP AIR PORTUGALMIA-LISDec 2024
If you have connections make sure they are at least tree hours from your landing time
Verified travelerFlew with British AirwaysPHL-LISSep 2024
Make sure you arrive early enough for boarding. I had a 1 hr layover from Charleston that that was just enough time to get off the plane and walk over to the international side before they started boarding.
LexFlew with TAP AIR PORTUGALIAD-LISAug 2024
I had long wait at customs. Please plan accordingly.
ThuFlew with TAP AIR PORTUGALSFO-LISApr 2024
Weigh bags. They will check. Check in with gate or desk. Sometimes the e ticket will not work for boarding.
MaximFlew with TAP AIR PORTUGALBOS-LISMar 2024
I was waiting for a flight boarding announcement in the Lounge in terminal C at Logan Airport in Boston, but the announcement never came. If I did not go to the gate to check, I might have missed the flight. So, do not count on the airline to communicate flight boarding information to the lounge staff. They are supposed to do that, but, apparently, sometimes it does not happen.

FAQs - booking Sines flights

  • How long is the flight to Sines?

    Flights from Chicago8h 40m
    Flights from Newark7h 36m
    Flights from Boston7h 12m
    Flights from Miami8h 47m
    Flights from Los Angeles11h 47m
  • What is the cheapest flight to Lisbon?

    In the last 3 days, the cheapest flight deal to Lisbon was found on the route from Newark, at $175 return. The most popular connection is from Boston to Lisbon and KAYAK users have found round-trip deals for as low as $385 in the last 3 days.

  • Which airlines fly to Lisbon?

    Many airlines fly to Lisbon, the most common ones being TAP AIR PORTUGAL, Delta, and United Airlines. See the amount of flights per week for popular airlines flying to Lisbon.

  • How to fly to Sines?

    You cannot fly directly to Sines. KAYAK recommends you fly to Lisbon Humberto Delgado (LIS) (58.41 miles from Sines). From there you can rent a car or get a taxi.

  • What airports are near Sines?

    The closest airport is Lisbon Humberto Delgado (LIS) (58.41 mi). Other nearby airports are Cascais Aerodrome (CAT) (59.06 mi) or Faro (FAO) (81.74 mi). KAYAK recommends you fly to Lisbon Humberto Delgado.

  • How far is Lisbon Humberto Delgado Airport from central Lisbon?

    The distance between Lisbon Humberto Delgado Airport and downtown Lisbon is 4 miles.

  • What is the name of Lisbon’s airport?

    There is only 1 airport in Lisbon, called Lisbon Humberto Delgado Airport (LIS). It can also be referred to as Humberto Delgado, Lisbon, Lisbon Humberto Delgado, Lisbon Portela, or Portela.

  • How does KAYAK find such low prices on flights to Sines?

    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 to Sines.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Sines?

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

  • What is the Hacker Fare option on flights to Sines?

    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 Sines with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Sines?

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

Top tips for finding cheap flights to Sines

  • There is no major airport in Sines. It is instead served by Lisbon Humberto Delgado Airport.
  • Looking for cheap airfare to Sines? 25% of our users found round-trip tickets to Sines for the following prices or less: From Miami $1,236, from Los Angeles $1,394, from Boston $1,442
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Sines flight deals.

Reviews of the top 5 airlines flying to Sines

 
Need help choosing which airline to fly with from the United States to Sines? 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.
8.0
DeltaOverall score based on 7983 reviews
7.9Entertainment
8.2Boarding
7.9Comfort
7.3Food
8.5Crew
Airline reviews

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

2.0 MediocreGim, Jul 2025BGM - DTW
Read more Delta reviews

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

We had to turn around and head back to Manchester. Problem with a plane engine.

Flight was delayed. Staff at the gate effectively and proactively communicated about the delay.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

Very rude person at the boarding desk; flight attendant coughing 3 inches from my face three times- not even covering her mouth; boarding process very unacceptable for older people with stairs to all planes (are you all stuck in the 1960’s?). I am sure that I am not remembering all of the negative things, but I am sure you get the message!

There was chaos at the Naples airport. We arrived three hours early for the flight but there was no invitation available about where to go to check bags until an hour later. Then we had to go to a different terminal to check our bags and check in and back to the first to board.

We flew TAP last October from Newark to Lisbon. The meal was bad. This flight had good food. Also, this flight was delayed. There were TAP employees waiting at Lisbon to make sure we made our connecting flight. I find the TAP website and app frustrating, but the service once we reached the airport was very good

The airport temperature at the airport and on the flight was too warm

Boarding too way too long. Biggest peeve: zero in-seat power in economy! No plug sockets, no USB ports. Plane was an A330, so not old.

boarding is so disorganized, i was literally appalled at the boarding experience

Comfortable but not Polaris or Delta comfort Business Class. Overall 7 out of 10

Tap air Portugal was the best I will traveling again with u guys. Thank u.

The long wait at JFK made the trip horrible. Also not having enough buses when we deplaned was annoying

Terrible! I had to cancel our flights due to my wife Carmen requiring an unexpected second cancer surgery. I first contacted orbitz about obtaining a credit due to medical interruption and orbitz directed me to TAP. I contacted TAP and the representative directed me back to orbitz and refused to even explain what TAP’s medical interruption policy was or how it worked—I wanted that information for a second call to orbitz. Terrible service at a particularly difficult time.

Flight was delayed. Though I checked in with BA live chat three times, our special meals were not provided.

My experience with British Airways is excellent, thanks for all 🫶🏻✈️

Old tired plane, Uncomfortable business class seat. Breakfast dreadful and meagre. At least flight was on time!

Safe arrival. Improvement on Time efficiency Effective Communication will be great.

The crew is very friendly and helpful. The food is good for airplane food. The flight is long and hard to sleep. The leg space is great. The plane arrived in plenty of time.

A good flight back to Tampa and thankfully although we had a 90 minute delay because of thunder storms from Charlotte to bottom iof Florida, it was a prudent to avoid these for a comfortable flight as opposed to being tossed around with turbulence.

They removed our booking without telling us. Cost us thousands to book last minute

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

The on flight entertainment system touch screen system and the USB charger did not work on multiple seats on least 4 seats an in different rows. The attendant tried to reset the system but was un successful. I couldn't change my phone to get my ticket for my next flight. This was an international flight I changed seats and the problem was the same. the flight attendant offered his power bank

Captain sick. Unable to get replacement so delayed me 30 hours, many others delayed 54 hours. TOTALLY DESTROYED ALL MY PLANS, including lost my rental car which would now cost over 5 times what I paid so stuck with buses n trains... lost hotel reservations.... HORRIBLE!!!

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