BOS - SID

$558 Find Cheap Flights from Boston to Espargos - Compare and Save

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 7/29. 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

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Everything you should know

Cheapest round-trip
$843
Typical prices: $965-$1,085
TAP AIR PORTUGAL
Wed 8/26Thu 9/3
BOS - SID • 1 stop
Cheapest one-way
$558
Multiple Airlines
Wed 7/29
BOS - SID • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Boston and Espargos. You'll need at least 1 connection.
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When to travel
Cheapest • 27% price drop
Most popular
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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

Wed, Aug 26 - Thu, Sep 3
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
$843TAP AIR PORTUGAL
Fri, Jan 15 - Sun, Jan 24
TAP AIR PORTUGAL Logo
6:00 pm - 12:05 am
BOS
-
SID
26h 05m
1 stop
TAP AIR PORTUGAL Logo
1:05 am - 2:40 pm
SID
-
BOS
41h 35m
1 stop
$856TAP AIR PORTUGAL
Fri, Aug 28 - Fri, Sep 4
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:45 pm - 2:45 pm
SID
-
BOS
29h 00m
1 stop
$914TAP AIR PORTUGAL
Wed, Sep 9 - Sun, Sep 13
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
$924TAP AIR PORTUGAL
Wed, Sep 9 - Mon, Sep 14
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
$927TAP AIR PORTUGAL
Wed, Sep 9 - Tue, Sep 15
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
$931TAP AIR PORTUGAL
Wed, Sep 9 - Mon, Sep 14
TAP AIR PORTUGAL Logo
10:45 pm - 11:40 am
BOS
-
SID
33h 55m
1 stop
TAP AIR PORTUGAL Logo
12:15 am - 2:45 pm
SID
-
BOS
17h 30m
1 stop
$933TAP AIR PORTUGAL
Thu, Sep 10 - Mon, Sep 14
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
$944TAP AIR PORTUGAL
Wed, Aug 26 - Sun, Sep 6
TAP AIR PORTUGAL Logo
10:45 pm - 11:15 pm
BOS
-
SID
21h 30m
1 stop
TAP AIR PORTUGAL Logo
12:45 pm - 2:45 pm
SID
-
BOS
29h 00m
1 stop
$991TAP AIR PORTUGAL
Sun, Aug 30 - Sun, Sep 6
TAP AIR PORTUGAL Logo
10:40 pm - 11:15 pm
BOS
-
SID
21h 35m
1 stop
TAP AIR PORTUGAL Logo
12:45 pm - 2:45 pm
SID
-
BOS
29h 00m
1 stop
$1,002TAP 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 August.

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 $825 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,658 and $1,431 respectively.

Good to know

Low season

November

Cheapest flight

$558
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 10% 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 5 days, the lowest price for a flight from Boston to Espargos was $558 for a one-way ticket and $843 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.
7.2
TAP AIR PORTUGALOverall score based on 2341 reviews
7.1Comfort
7.8Crew
6.4Entertainment
7.0Boarding
6.3Food
Airline reviews

Everything was good with Tap Air Portugal. It was Logan Airport that was a problem. The fuel system was down and delayed my 10:40 boarding. I wasn't able to board my flight until 2:00 am...after that my flights were great.

10.0 ExcellentYahya, Jul 2026
BOS - LIS
Read more TAP AIR PORTUGAL reviews

Everything was good with Tap Air Portugal. It was Logan Airport that was a problem. The fuel system was down and delayed my 10:40 boarding. I wasn't able to board my flight until 2:00 am...after that my flights were great.

The crew was excellent. What I did not enjoy was the food. I have taken many international flights and this was on the low end. Otherwise the trip was fine.

Seats were the most uncomfortable seats i ever experienced on a flight to Europe from Boston. It was a waist of money in buying premium seats for top dollars. I want my money back for what i paid extra for my seats. Awful conditions!

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.

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.

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.

Flight was packed. This was a very uncomfortable experience. Boarding process could be explained better. Despite recommending a window seat when travelling with a pet in the cabin, the seat in front of me had less space than the center and aisle seats. For Premium Economy, the seats were crammed with minimal legroom. I hate to think what Regular Economy was like. The cabin crew missed me at first when handing out meals. When my meal eventually came, there were no utensils. I'd originally booked to fly Business Class; those seats didn't look that great either.

I’m still missing my bags. I’m soo frustrated

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

Information on your arrival and departure airports