$419+ Cheap flights from Cardiff (CWL) to Boston (BOS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BOS
Sep 9 — Sep 161
Round-trip
1 adult, Economy
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Find cheap flights from Cardiff to Boston with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Cardiff to Boston
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Best
Last-minute
One-way
Cheapest flights from Cardiff to BostonExplore the most affordable flight options available from Cardiff to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
Explore the most affordable flight options available from Cardiff to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
This Mytrip deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:30 am -
1 stop16h 20m
Sat 9/199:15 pm -
1 stop19h 05m
Deal found 8/6![Multiple Airlines logo]()
$727
This TravelUp deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
1 stop11h 50m
Sat 9/194:40 pm -
1 stop19h 05m
Deal found 8/8![KLM logo]()
$813
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:50 pm -
2 stops41h 25m
Thu 9/1711:35 pm -
1 stop26h 20m
Deal found 8/8![Multiple Airlines logo]()
$818
This Virgin Atlantic deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:45 am -
1 stop13h 45m
Fri 9/114:40 pm -
1 stop19h 25m
Deal found 8/5![Virgin Atlantic logo]()
$834
This Virgin Atlantic deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
1 stop13h 45m
Sat 9/197:35 pm -
2 stops16h 10m
Deal found 8/8![Virgin Atlantic logo]()
$836
This KLM deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:45 am -
2 stops17h 58m
Fri 9/114:40 pm -
1 stop11h 35m
Deal found 8/5![KLM logo]()
$845
This Expedia deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:15 pm -
1 stop25h 04m
Thu 9/179:20 am -
2 stops18h 55m
Deal found 8/8![KLM logo]()
$850
This KLM deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:20 am -
1 stop13h 41m
Sat 1/97:15 pm -
1 stop9h 30m
Deal found 8/6![KLM logo]()
$871
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:20 am -
1 stop13h 41m
Sat 1/97:15 pm -
1 stop9h 30m
Deal found 8/7![Delta logo]()
$872
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
2 stops19h 14m
Sat 9/197:35 pm -
2 stops16h 10m
Deal found 8/8![Delta logo]()
$874
Best flights from Cardiff to BostonDiscover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
Discover carefully curated flight deals from Cardiff to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
This Virgin Atlantic deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:45 am -
1 stop13h 45m
Fri 9/114:40 pm -
1 stop19h 25m
Deal found 8/5![Virgin Atlantic logo]()
$834
This KLM deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:45 am -
2 stops17h 58m
Fri 9/114:40 pm -
1 stop11h 35m
Deal found 8/5![KLM logo]()
$845
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:20 am -
1 stop13h 41m
Sat 1/97:15 pm -
1 stop9h 30m
Deal found 8/7![Delta logo]()
$872
This Mytrip deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:30 am -
3 stops31h 20m
Sat 9/198:50 pm -
2 stops19h 30m
Deal found 8/8![Multiple Airlines logo]()
$915
This Virgin Atlantic deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
1 stop13h 45m
Sat 9/197:35 pm -
2 stops16h 10m
Deal found 8/8![Virgin Atlantic logo]()
$836
This Expedia deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:15 pm -
1 stop25h 04m
Thu 9/179:20 am -
2 stops18h 55m
Deal found 8/8![KLM logo]()
$850
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
2 stops19h 14m
Sat 9/197:35 pm -
2 stops16h 10m
Deal found 8/8![Delta logo]()
$874
This KLM deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:20 am -
1 stop13h 41m
Sat 1/97:15 pm -
1 stop9h 30m
Deal found 8/6![KLM logo]()
$871
Last-minute flights from Cardiff to BostonDiscover last-minute flight deals from Cardiff to Boston. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Cardiff to Boston. Data last updated August 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:50 pm -
2 stops41h 25m
Thu 9/1711:35 pm -
1 stop26h 20m
Deal found 8/8![Multiple Airlines logo]()
$818
This Expedia deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:15 pm -
1 stop25h 04m
Thu 9/179:20 am -
2 stops18h 55m
Deal found 8/8![KLM logo]()
$850
This TravelUp deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:45 am -
2 stops26h 40m
Thu 9/172:00 pm -
2 stops14h 15m
Deal found 8/8![Virgin Atlantic logo]()
$880
This Virgin Atlantic deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:45 am -
1 stop13h 45m
Fri 9/114:40 pm -
1 stop19h 25m
Deal found 8/5![Virgin Atlantic logo]()
$834
This KLM deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:45 am -
2 stops17h 58m
Fri 9/114:40 pm -
1 stop11h 35m
Deal found 8/5![KLM logo]()
$845
This Mytrip deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:30 am -
1 stop16h 20m
Sat 9/199:15 pm -
1 stop19h 05m
Deal found 8/6![Multiple Airlines logo]()
$727
This TravelUp deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
1 stop11h 50m
Sat 9/194:40 pm -
1 stop19h 05m
Deal found 8/8![KLM logo]()
$813
This Virgin Atlantic deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
1 stop13h 45m
Sat 9/197:35 pm -
2 stops16h 10m
Deal found 8/8![Virgin Atlantic logo]()
$836
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:45 am -
2 stops19h 14m
Sat 9/197:35 pm -
2 stops16h 10m
Deal found 8/8![Delta logo]()
$874
One-way flights from Cardiff to BostonSearch for one-way flight options from Cardiff to Boston. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
Search for one-way flight options from Cardiff to Boston. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/64:15 pm -
3 stops32h 15m
Deal found 8/8![Multiple Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:45 pm -
3 stops40h 20m
Deal found 8/5![Multiple Airlines logo]()
$421
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:50 pm -
2 stops26h 15m
Deal found 8/8![Multiple Airlines logo]()
$456
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:35 am -
1 stop12h 40m
Deal found 8/7![Multiple Airlines logo]()
$489
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:45 pm -
3 stops27h 10m
Deal found 8/7![Multiple Airlines logo]()
$589
Find flight deals from Cardiff to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $727 (Mytrip) |
One-way from | $419 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Cardiff to Boston 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, Cheapflights users made 2,558,603 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Cardiff to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Fri 9/4
9:45 am-6:30 pm
1 stop13h 45m
Boston Logan Intl
Fri 9/11
4:40 pm-5:05 pm
1 stop19h 25m
$834
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Sat 9/5
9:45 am-6:30 pm
1 stop13h 45m
Boston Logan Intl
Sat 9/19
7:35 pm-4:45 pm
2 stops16h 10m
$836
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Fri 9/4
9:45 am-10:43 pm
2 stops17h 58m
Boston Logan Intl
Fri 9/11
4:40 pm-9:15 am
1 stop11h 35m
$845
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Thu 9/3
5:15 pm-1:19 pm
1 stop25h 04m
Boston Logan Intl
Thu 9/17
9:20 am-9:15 am
2 stops18h 55m
$850
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Fri 12/11
10:20 am-7:01 pm
1 stop13h 41m
Boston Logan Intl
Sat 1/9
7:15 pm-9:45 am
1 stop9h 30m
$871
Quickest round-trip
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Fri 12/11
10:20 am-7:01 pm
1 stop13h 41m
Boston Logan Intl
Sat 1/9
7:15 pm-9:45 am
1 stop9h 30m
$872
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Sat 9/5
9:45 am-11:59 pm
2 stops19h 14m
Boston Logan Intl
Sat 9/19
7:35 pm-4:45 pm
2 stops16h 10m
$874
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Sat 9/5
7:30 am-9:50 am
3 stops31h 20m
Boston Logan Intl
Sat 9/19
8:50 pm-9:20 pm
2 stops19h 30m
$915
Cheapest one-way
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Tue 10/6
4:15 pm-7:30 pm
3 stops32h 15m
$419
CardiffBoston
CWL Cardiff Wales - BOS Boston Logan Intl
CWLBOS
Cardiff Wales
Sun 8/23
9:45 pm-9:05 am
3 stops40h 20m
$421
Showing 1-10 of 12 resultsSorted by cheapest first
Compare providers for flights from Cardiff to Boston
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Cardiff to Boston in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Cardiff-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Cardiff-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Cardiff-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Cardiff-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Cardiff-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Cardiff to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Cardiff with our price prediction graph.
CWL-BOS
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Related info for your journey
Find useful and relevant information for your journey from Cardiff to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Randolph
Cambridge
Concord
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Seekonk
Cranston
Dedham
Warwick
Peabody
Hampton Beach
Auburn
York Beach
Chelsea
Londonderry
Swansea
Fitchburg
North Falmouth
Braintree
Revere
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