BOS - SID

$479 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 3/29. 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
$715
Overall average: $1,134
TAP AIR PORTUGAL
Tue 5/5Mon 5/11
BOS - SID • 1 stop
Cheapest one-way
$479
Multiple Airlines
Sun 3/29
BOS - SID • 3 stops
Nonstop flights
Not available
There are currently no direct flights between Boston and Espargos. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 22% 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

Tue, May 5 - Mon, May 11
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 2:45 pm
SID
-
BOS
17h 30m
1 stop
$715TAP AIR PORTUGAL
Mon, Apr 27 - Tue, May 5
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
1 stop
$716TAP AIR PORTUGAL
Tue, Apr 28 - Wed, May 6
TAP AIR PORTUGAL Logo
6:05 pm - 11:15 pm
BOS
-
SID
26h 10m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
1 stop
$717TAP AIR PORTUGAL
Thu, Apr 30 - Fri, May 8
TAP AIR PORTUGAL Logo
6:05 pm - 11:15 pm
BOS
-
SID
26h 10m
1 stop
TAP AIR PORTUGAL Logo
12:45 pm - 2:45 pm
SID
-
BOS
29h 00m
1 stop
$785TAP AIR PORTUGAL
Mon, Apr 27 - Tue, May 5
TAP AIR PORTUGAL Logo
10:30 pm - 11:15 pm
BOS
-
SID
21h 45m
2 stops
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
1 stop
$899TAP AIR PORTUGAL
Tue, May 5 - Mon, May 11
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
47h 05m
2 stops
$929TAP AIR PORTUGAL
Thu, Apr 23 - Fri, May 1
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
2 stops
$938TAP AIR PORTUGAL
Sat, Apr 25 - Fri, May 1
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
2 stops
$945TAP AIR PORTUGAL
Thu, Apr 23 - Fri, May 1
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
2 stops
$948TAP AIR PORTUGAL
Sat, Apr 25 - Fri, May 1
TAP AIR PORTUGAL Logo
6:05 pm - 11:15 pm
BOS
-
SID
26h 10m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 2:45 pm
SID
-
BOS
17h 30m
1 stop
$1,001TAP AIR PORTUGAL
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.

How much is a round-trip flight from Boston to Espargos?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Espargos departing in May.

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 September, where tickets cost $826 (return) on average. On the other hand, the most expensive months are July and January, where the average cost of round-trip tickets is $1,256 and $1,251 respectively.

Good to know

Low seasonMay
Cheapest flight$479
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly with an average 18% 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 $479 for a one-way ticket and $715 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 2155 reviews
6.2Food
7.8Crew
6.3Entertainment
7.0Boarding
7.1Comfort
Airline reviews

First time flying Business with Tap, I think it was a very good experience. It beats many domestic US carriers, the food options were really great, authentic Portuguese food, wines & deserts. Next time will do the free 24-48 hour stopover in Lisbon or Porto for sure.

8.0 ExcellentAnonymous, Feb 2026
LAX - LIS
Read more TAP AIR PORTUGAL reviews

First time flying Business with Tap, I think it was a very good experience. It beats many domestic US carriers, the food options were really great, authentic Portuguese food, wines & deserts. Next time will do the free 24-48 hour stopover in Lisbon or Porto for sure.

Late. Lack of updates. Rude hostesses. Terrible food. Lack of headphones.

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

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