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Cheap flights from Boston to Cagliari from $699

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Cagliari departing on 9/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Cagliari

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:45 pm - 6:45 pm
BOS
-
CAG
20h 00m
2 stops
Multiple Airlines Logo
1:10 am - 2:45 pm
CAG
-
BOS
19h 35m
2 stops
$699Multiple Airlines
Sat, Sep 5 - Sun, Sep 6
Lufthansa Logo
9:25 am - 5:45 pm
BOS
-
CAG
26h 20m
2 stops
Lufthansa Logo
6:35 pm - 5:40 pm
CAG
-
BOS
29h 05m
1 stop
$734Lufthansa
Sun, Aug 2 - Tue, Aug 18
Multiple Airlines Logo
8:15 pm - 7:25 pm
BOS
-
CAG
17h 10m
1 stop
Multiple Airlines Logo
2:00 pm - 9:05 pm
CAG
-
BOS
13h 05m
1 stop
$747Multiple Airlines
Tue, Sep 22 - Wed, Sep 30
Multiple Airlines Logo
7:00 pm - 7:25 pm
BOS
-
CAG
18h 25m
2 stops
Multiple Airlines Logo
2:00 pm - 9:05 pm
CAG
-
BOS
13h 05m
1 stop
$751Multiple Airlines
Tue, Sep 22 - Wed, Sep 30
Multiple Airlines Logo
8:05 pm - 5:45 pm
BOS
-
CAG
15h 40m
1 stop
Multiple Airlines Logo
4:05 pm - 3:10 pm
CAG
-
BOS
29h 05m
1 stop
$779Multiple Airlines
Wed, Aug 5 - Wed, Aug 19
SWISS Logo
5:10 pm - 1:20 pm
BOS
-
CAG
14h 10m
1 stop
SWISS Logo
8:55 am - 7:55 pm
CAG
-
BOS
17h 00m
1 stop
$785SWISS
Thu, Aug 20 - Tue, Aug 25
Multiple Airlines Logo
8:05 pm - 5:45 pm
BOS
-
CAG
15h 40m
1 stop
Multiple Airlines Logo
6:35 pm - 5:40 pm
CAG
-
BOS
29h 05m
1 stop
$799Multiple Airlines
Sun, Aug 2 - Tue, Aug 18
Multiple Airlines Logo
2:28 pm - 6:10 pm
BOS
-
CAG
21h 42m
2 stops
Multiple Airlines Logo
8:55 am - 7:55 pm
CAG
-
BOS
17h 00m
1 stop
$806Multiple Airlines
Wed, Aug 19 - Tue, Aug 25
Multiple Airlines Logo
5:45 am - 6:10 pm
BOS
-
CAG
30h 25m
2 stops
Multiple Airlines Logo
4:05 pm - 3:10 pm
CAG
-
BOS
29h 05m
1 stop
$807Multiple Airlines
Wed, Aug 5 - Wed, Aug 19
Multiple Airlines Logo
8:05 pm - 5:45 pm
BOS
-
CAG
15h 40m
1 stop
Multiple Airlines Logo
10:00 am - 3:10 pm
CAG
-
BOS
11h 10m
1 stop
$829Multiple Airlines
Fri, Aug 21 - Wed, Aug 26

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Lufthansa flights from Boston to Cagliari

Our best Lufthansa deals on Boston to Cagliari flight tickets
Lufthansa
Aug 2
BOS9:25 amBoston Logan Intl
26h 20m
2 stops
CAG5:45 pmCagliari Elmas
Aug 18
CAG6:35 pmCagliari Elmas
29h 05m
1 stop
BOS5:40 pmBoston Logan Intl
$734
Lufthansa
Aug 2
BOS7:27 pmBoston Logan Intl
16h 18m
2 stops
CAG5:45 pmCagliari Elmas
Aug 18
CAG6:35 pmCagliari Elmas
27h 05m
2 stops
BOS3:40 pmBoston Logan Intl
$831
Lufthansa
Aug 5
BOS8:05 pmBoston Logan Intl
16h 05m
2 stops
CAG6:10 pmCagliari Elmas
Aug 19
CAG6:35 pmCagliari Elmas
27h 05m
2 stops
BOS3:40 pmBoston Logan Intl
$846

Delta flights from Boston to Cagliari

Our best Delta deals on Boston to Cagliari flight tickets
Delta
Jul 15
BOS1:10 pmBoston Logan Intl
16h 35m
2 stops
CAG11:45 amCagliari Elmas
Jul 29
CAG5:05 pmCagliari Elmas
29h 35m
1 stop
BOS4:40 pmBoston Logan Intl
$899
Delta
Jul 15
BOS1:10 pmBoston Logan Intl
16h 35m
2 stops
CAG11:45 amCagliari Elmas
Jul 29
CAG5:05 pmCagliari Elmas
32h 11m
2 stops
BOS7:16 pmBoston Logan Intl
$910
Delta
Sep 4
BOS5:10 pmBoston Logan Intl
18h 50m
1 stop
CAG6:00 pmCagliari Elmas
Sep 14
CAG5:05 pmCagliari Elmas
32h 03m
2 stops
BOS7:08 pmBoston Logan Intl
$916

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Cagliari that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 18, 2026.
Use the filters below to find and compare flights from Boston to Cagliari that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Sat 9/5

4:45 pm-6:45 pm

2 stops20h 00m

Cagliari Elmas

Sun 9/6

1:10 am-2:45 pm

2 stops19h 35m

$699

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Sun 8/2

9:25 am-5:45 pm

2 stops26h 20m

Cagliari Elmas

Tue 8/18

6:35 pm-5:40 pm

1 stop29h 05m

$734

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Tue 9/22

8:15 pm-7:25 pm

1 stop17h 10m

Cagliari Elmas

Wed 9/30

2:00 pm-9:05 pm

1 stop13h 05m

$747

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Tue 9/22

7:00 pm-7:25 pm

2 stops18h 25m

Cagliari Elmas

Wed 9/30

2:00 pm-9:05 pm

1 stop13h 05m

$751

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Wed 8/5

8:05 pm-5:45 pm

1 stop15h 40m

Cagliari Elmas

Wed 8/19

4:05 pm-3:10 pm

1 stop29h 05m

$779

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Thu 8/20

5:10 pm-1:20 pm

1 stop14h 10m

Cagliari Elmas

Tue 8/25

8:55 am-7:55 pm

1 stop17h 00m

$785

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Sun 8/2

8:05 pm-5:45 pm

1 stop15h 40m

Cagliari Elmas

Tue 8/18

6:35 pm-5:40 pm

1 stop29h 05m

$799

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Wed 8/19

2:28 pm-6:10 pm

2 stops21h 42m

Cagliari Elmas

Tue 8/25

8:55 am-7:55 pm

1 stop17h 00m

$806

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Wed 8/5

5:45 am-6:10 pm

2 stops30h 25m

Cagliari Elmas

Wed 8/19

4:05 pm-3:10 pm

1 stop29h 05m

$807
Quickest round-trip

BostonCagliari

BOS - CAG

BOSCAG

Boston Logan Intl

Fri 8/21

8:05 pm-5:45 pm

1 stop15h 40m

Cagliari Elmas

Wed 8/26

10:00 am-3:10 pm

1 stop11h 10m

$829

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Cagliari from

How to get the cheapest flight ticket from Boston to Cagliari

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What airlines fly to Cagliari?

Lufthansa, SWISS and Delta are the top three most popular airlines that fly to Cagliari from Boston according to our data. Lufthansa is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Cagliari. Keep in mind that there are 3 different airlines that fly to Cagliari on a routine basis, so you have a few additional options to choose from.

When to book flights from Boston to Cagliari

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Cagliari according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Cagliari (BOS to CAG) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Cagliari

Fastest flight time

15h 40m

Direct flights

None
The fastest flight from Boston to Cagliari takes 15h 40m
There are no direct flights from Boston to Cagliari. There are no popular flight routes from Boston to Cagliari.
Search flight deals

Frequently asked questions about flying from Boston to Cagliari

  • How far is Boston Logan Intl to Cagliari Elmas by plane?

    A flight from Boston Logan Intl to Cagliari Elmas will travel around 4033.5 mi. By plane, this route typically takes 15h 40m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Cagliari Elmas Airport?

    Prices for flights from Boston Logan Intl Airport to Cagliari Elmas Airport refresh daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Cagliari Elmas Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Cagliari Elmas Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to Cagliari Elmas Airport.

  • What documentation or ID do you need to fly to Cagliari Elmas Airport?

    The travel and health documents required for your trip to Cagliari Elmas Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Cagliari Elmas Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Boston to Cagliari?

Best airlines flying from Boston to Cagliari

Compare and see reviews for airlines that fly from Boston to Cagliari with momondo
Airline
Rating
Free Cancellation
Price
SWISSPriceFrom $525Free CancellationRating
7.5
1,971 reviews
Search SWISS flights
DeltaPriceFrom $555Free CancellationRating
7.8
8,410 reviews
Search Delta flights
LufthansaPriceFrom $575Free CancellationRating
6.8
8,071 reviews
Search Lufthansa flights

Traveling to a place near Cagliari?

Book flights to Cagliari if you plan to visit one of these locations
Villasimius
Arbatax
Oristano
Pula

Why use momondo?

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Can I find flights from Boston to Cagliari with flexible booking policies on momondo?

All flight searches from Boston to Cagliari on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Boston to Cagliari?

momondo provides multiple filters to help you find the best flight to Cagliari from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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