BOS - SID

$556 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 7/26. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$1,041
Typical prices: $928-$881
TAP AIR PORTUGAL
Thu 10/1Wed 10/7
BOS - SID • 1 stop
Cheapest one-way
$556
Multiple Airlines
Sun 7/26
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
Cheapest • 23% price drop
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, Oct 1 - Wed, Oct 7
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
$1,041TAP AIR PORTUGAL
Sat, Oct 10 - Fri, Oct 16
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
$1,082TAP AIR PORTUGAL
Sat, Oct 10 - Fri, Oct 16
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
$1,128TAP AIR PORTUGAL
Thu, Sep 3 - Wed, Sep 9
TAP AIR PORTUGAL Logo
10:20 pm - 11:15 pm
BOS
-
SID
21h 55m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 2:45 pm
SID
-
BOS
17h 30m
1 stop
$1,157TAP AIR PORTUGAL
Mon, May 18 - Wed, Jun 3
Multiple Airlines Logo
7:45 pm - 4:10 pm
BOS
-
SID
17h 25m
1 stop
Multiple Airlines Logo
2:45 pm - 9:42 pm
SID
-
BOS
57h 57m
2 stops
$1,192Multiple Airlines
Thu, Aug 27 - Sun, Aug 30
TAP AIR PORTUGAL Logo
10:20 pm - 11:15 pm
BOS
-
SID
21h 55m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 2:45 pm
SID
-
BOS
17h 30m
1 stop
$1,227TAP AIR PORTUGAL
Sat, Oct 10 - Fri, Oct 16
TAP AIR PORTUGAL Logo
11:15 pm - 11:15 pm
BOS
-
SID
21h 00m
2 stops
TAP AIR PORTUGAL Logo
12:15 am - 2:45 pm
SID
-
BOS
17h 30m
1 stop
$1,236TAP AIR PORTUGAL
Sat, Oct 10 - Fri, Oct 16
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
$1,237TAP AIR PORTUGAL
Thu, Aug 27 - Mon, Sep 21
TAP AIR PORTUGAL Logo
11:00 am - 11:15 pm
BOS
-
SID
33h 15m
2 stops
TAP AIR PORTUGAL Logo
12:15 am - 8:20 pm
SID
-
BOS
23h 05m
1 stop
$1,243TAP AIR PORTUGAL
Mon, May 18 - Tue, Jun 2
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
$1,312TAP 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 October.

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 $1,281 and $1,251 respectively.

Good to know

Low seasonNovember
Cheapest flight$556
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 24% lower on average.
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 $556 for a one-way ticket and $1,041 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 2212 reviews
7.0Boarding
6.3Entertainment
7.8Crew
7.1Comfort
6.2Food
Airline reviews

The flight crew were absolute rock stars. When they came to the gate they looked like royalty, so chic. They also were extremely kind. Food was good and I loved the lack of plastic waste. The flight was lovely and smooth.

10.0 ExcellentRebecca, Apr 2026
BOS - OPO
Read more TAP AIR PORTUGAL reviews

The flight crew were absolute rock stars. When they came to the gate they looked like royalty, so chic. They also were extremely kind. Food was good and I loved the lack of plastic waste. The flight was lovely and smooth.

We were unable to check in due to technical problems on TAP’s end. The flight was delayed forty minutes with no reason given. We received timely notice of the flight delay. We were also notified of a gate change. The new gate was at a different terminal. When we got to the new terminal, we learned that we had to go back to the old terminal first to check in. This information should have been included along with the gate change notification. Also unexplained, the steward skipped us when offering breakfast.

They left our luggage uncovered on tarmac in pouring rain during an hour delay of departure! At our final destination, we found ALL OF OUR CLOTHES/SHOES soaked all the way through!! Our 1st connection plane was a great business class accommodation but only 50 minutes long. Our 2nd connection from Lisbon (another delay with luggage uncovered on tarmac) had only the extra legroom and mediocre food in business class - no entertainment and no extra comfort seating. Will not use TAP Air Portugal again!

Horrible experience at tbe check in ladie she was very racist ,she doesn't speak portuguese too and forced me to check in my carrion bag and I saw everyone with carrion bag inside anda lot of space ,she was rude unprofessional

Absolutely unacceptable level of service for a Business class: lousy drink and food options, disgusting food (inedible meat, watery rice, etc...), pathetic level of attentiveness from staff, Business class restrooms were not accessible for long periods because blocked of by staff...overall extremely disappointing, will NEVER fly Business on TAP again.

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.

We upgraded to business class. Nice seat with lots of room but otherwise not impressive.

Bad. They gave me a voucher for food to use at the airport but didn’t have time since I had to catch the other plane. No refunds and lack of communication

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.

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

Information on your arrival and departure airports