BOS - SID

$362 Find Cheap Flights from Boston to Espargos

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Espargos departing on 3/9. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Espargos

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Espargos, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Espargos, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$802
Overall average: $1,109
TAP AIR PORTUGAL
Thu 4/23Thu 4/30
BOS - SID • 1 stop
Cheapest one-way
$362
Multiple Airlines
Mon 3/9
BOS - SID • 2 stops
When to travel
January
Cheapest • 21% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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 Espargos!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Espargos (BOS-SID)

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

Thu, Apr 23 - Thu, Apr 30
TAP AIR PORTUGAL Logo
6:05 pm - 11:15 pm
BOS
-
SID
26h 10m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:25 pm
SID
-
BOS
23h 10m
1 stop
$802TAP AIR PORTUGAL
Thu, Apr 23 - Thu, Apr 30
TAP AIR PORTUGAL Logo
6:05 pm - 11:40 am
BOS
-
SID
14h 35m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 2:40 pm
SID
-
BOS
17h 25m
1 stop
$813TAP AIR PORTUGAL
Sun, Mar 1 - Wed, Mar 4
Multiple Airlines Logo
6:05 pm - 5:10 pm
BOS
-
SID
19h 05m
2 stops
Multiple Airlines Logo
5:50 pm - 2:35 pm
SID
-
BOS
24h 45m
2 stops
$828Multiple Airlines
Sun, Mar 8 - Sun, Mar 29
TAP AIR PORTUGAL Logo
11:45 pm - 12:05 am
BOS
-
SID
21h 20m
1 stop
TAP AIR PORTUGAL Logo
12:45 pm - 2:40 pm
SID
-
BOS
28h 55m
1 stop
$843TAP AIR PORTUGAL
Sat, Feb 7 - Tue, Feb 24
Multiple Airlines Logo
10:25 pm - 4:15 pm
BOS
-
SID
13h 50m
1 stop
Multiple Airlines Logo
6:05 pm - 2:35 pm
SID
-
BOS
24h 30m
1 stop
$858Multiple Airlines
Sat, Feb 7 - Mon, Feb 23
TAP AIR PORTUGAL Logo
6:05 pm - 12:30 pm
BOS
-
SID
14h 25m
1 stop
TAP AIR PORTUGAL Logo
1:05 am - 2:35 pm
SID
-
BOS
41h 30m
1 stop
$860TAP AIR PORTUGAL
Sun, Mar 1 - Thu, Mar 19
Multiple Airlines Logo
9:35 pm - 12:05 am
BOS
-
SID
22h 30m
2 stops
Multiple Airlines Logo
1:05 am - 8:45 pm
SID
-
BOS
22h 40m
2 stops
$873Multiple Airlines
Sat, Mar 7 - Fri, Mar 13
TAP AIR PORTUGAL Logo
10:25 pm - 12:05 am
BOS
-
SID
21h 40m
1 stop
TAP AIR PORTUGAL Logo
1:05 am - 3:35 pm
SID
-
BOS
41h 30m
1 stop
$879TAP AIR PORTUGAL
Sat, Mar 21 - Fri, Mar 27
TAP AIR PORTUGAL Logo
11:25 pm - 12:05 am
BOS
-
SID
21h 40m
1 stop
TAP AIR PORTUGAL Logo
1:05 am - 2:40 pm
SID
-
BOS
40h 35m
1 stop
$884TAP AIR PORTUGAL
Fri, Feb 20 - Tue, Feb 24
Multiple Airlines Logo
5:35 pm - 4:15 pm
BOS
-
SID
42h 40m
2 stops
Multiple Airlines Logo
6:05 pm - 3:50 pm
SID
-
BOS
49h 45m
2 stops
$887Multiple Airlines
Booking Insights

KAYAK's insights & trends for Boston to Espargos flights

Get data-powered insights and trends into flights from Boston to Espargos to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Boston to Espargos?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Espargos, 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 Boston to Espargos is January, where tickets cost $806 (return) on average. On the other hand, the most expensive months are July and November, where the average cost of round-trip tickets is $1,256 and $1,179 respectively.

Good to know

Low seasonMay
Cheapest flight$362
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly with an average 23% increase in price.
Flight from Boston to Espargos

When to book flights from Boston to Espargos

Are your dates flexible? Find out the best times to travel from Boston to Espargos 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 flights from Boston to Espargos

  • What is the cheapest flight from Boston to Espargos?

    In the last 3 days, the lowest price for a flight from Boston to Espargos was $362 for a one-way ticket and $802 for a round-trip.

  • Do I need a passport to fly between Boston and Espargos?

    Yes

  • Which aircraft models fly most regularly from Boston to Espargos?

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

  • Which airline alliances offer flights from Boston to Espargos?

    Star Alliance is the only airline alliance operating flights between Boston and Espargos.

  • How does KAYAK find such low prices on flights from Boston to Espargos?

    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 Boston to Espargos.

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

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

    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 Espargos with an airline and back to Boston with another airline. Booking your flights between Boston and SID 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 Boston to Espargos?

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

Reviews of the top airline flying from Boston to Espargos

 
See real verified KAYAK customer reviews for airlines flying from Boston to Espargos. 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 Boston to Espargos? 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.
7.1
TAP AIR PORTUGALOverall score based on 2121 reviews
7.1Comfort
6.3Entertainment
7.0Boarding
7.8Crew
6.2Food
Airline reviews

Flight was delayed but crew gave little to no communication, then “began boarding” but really just had everyone stand up and wait for an hour without any news or updates, as if we were going to start boarding at any second. Total chaos. Seemed like this was their first time boarding a plane. When we arrived at our destination, we waited for over an hour for the baggage claim belt to even turn on. Probably waited at baggage claim for our luggage for close to two hours. Everyone was very confused and of course we all worried that the luggage was lost. Again, zero communication and everyone we asked just said “I don’t know.” So we were left wondering whether to wait, or file a missing baggage claim, or check the other baggage claim belts (which we did every fifteen-twenty minutes because we were just confused). Lack of communication throughout the experience was a huge issue.

4.0 OkayAnonymous, Jan 2026
BOS - LIS
Read more TAP AIR PORTUGAL reviews

Flight was delayed but crew gave little to no communication, then “began boarding” but really just had everyone stand up and wait for an hour without any news or updates, as if we were going to start boarding at any second. Total chaos. Seemed like this was their first time boarding a plane. When we arrived at our destination, we waited for over an hour for the baggage claim belt to even turn on. Probably waited at baggage claim for our luggage for close to two hours. Everyone was very confused and of course we all worried that the luggage was lost. Again, zero communication and everyone we asked just said “I don’t know.” So we were left wondering whether to wait, or file a missing baggage claim, or check the other baggage claim belts (which we did every fifteen-twenty minutes because we were just confused). Lack of communication throughout the experience was a huge issue.

Booked business with TAP from LAX to Cabo Verde - overall ok, but just doesn’t feel like business class. More of a budget airline

I was disappointed of the crew, not friendly and attentive. Delay one way for fuel leakage and the plane is so hot. Not that great all around but I’m glad I experienced it so now know better.

Poor. Our flight was delayed and they told me I would be fine to make my connection in Lisbon, I missed it. Then they told me my bag would be automatically loaded onto my new flight to rome. It wasn’t. It’s been 4 days and I still don’t have it.

Boarding process was fast and efficient. Short flight but on time and well organized. I would certainly fly TAP again.

Plane was delayed, reading the gates on their screens was horrible. They posted it a half an hour before the plane boarded. By the time I got there with my premier boarding they have filled the plane because it was over booked. Gate closed at 12:03 I was there at 11:54 plane took over around 12:20. I was told they would put me on the next flight. I had to go to TAP information desk. They didn’t give me a voucher they just said they would put me on the next flight. At the desk I was told I had to punches a ticket. The woman said buy it online because it’s cheaper. It in fact was not cheaper. But I had gotten out of the long line that formed so I paid 200$ for a new ticket. At a later flight, not the next flight. I had checked my bag and was told it would be on my new flight. I was then bumped to an earlier flight and was told my bag would also be on my flight. After landing in Madrid loosing a day in my hotel i landed without my bag. They didn’t load it on any flight that day. It arrived in madrid the next day. Essentially ruining the first two days of my vacation. I’m now seeking compensation.

The business class seats were smaller and closer together than other airlines.

Boarding- Good Seat Comfort - OK Crew - Good Food - Mediocre On Time - Very Good

Didn't like much. Wheelchair assistance was almost nonexistent. No one at TAP check in process helpful. On the plane, stewards were not friendly and disorganized. Food was terrible for 8 hr flight. We were skipped at snack time and even though we tried to get attention using overhead call system no one even looked up at us to acknowledge. Being at the back of first section and by the lavatory we only were able to request when they came to pick up everyone else's garbage and they were nonchalant...no apology or even choice. The 1/2 half bread with slice of cheese was a waste. Deplaning was horrible but I'll blame lisbon airport for that. Plane left late at made good time still arrived about 15 behind schedule and for using remote deplaning and bus to terminal took another 20 min to gate. Those with connections were highly stressed. Took us 2 hrs from landing to get to ground transportation and exit airport. And that was with wheelchair assistance.

Bad boarding, threat to force bag check mid journey, lines, late, buses, more waiting awful end to end.

Everything you need to know for your flight from Boston to Espargos

Information on your arrival and departure airports