British Airways Flight 274 Deals & Information (2025/2026)

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British Airways Flight 274 Route Deals From $374

The cheapest prices found with in the last 7 days for return flights were $581 and $374 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 31 - Tue, Jan 20
LAS
Harry Reid Intl.
LHR
Heathrow
$581 Roundtrip, found 5 days ago
$581
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Dec 31 from Harry Reid Intl. to Heathrow, returning Tue, Jan 20, priced at $581 found 5 days ago
Wed, Dec 31 - Fri, Jan 16
LAS
Harry Reid Intl.
LHR
Heathrow
$582 Roundtrip, found 2 days ago
$582
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Dec 31 from Harry Reid Intl. to Heathrow, returning Fri, Jan 16, priced at $582 found 2 days ago
Wed, Dec 31 - Thu, Jan 29
LAS
Harry Reid Intl.
LHR
Heathrow
$586 Roundtrip, found 1 day ago
$586
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Dec 31 from Harry Reid Intl. to Heathrow, returning Thu, Jan 29, priced at $586 found 1 day ago
Wed, Dec 31 - Thu, Jan 29
LAS
Harry Reid Intl.
LHR
Heathrow
$592 Roundtrip, found 1 day ago
$592
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Dec 31 from Harry Reid Intl. to Heathrow, returning Thu, Jan 29, priced at $592 found 1 day ago
Wed, Aug 12 - Wed, Aug 26
LAS
Harry Reid Intl.
LHR
Heathrow
$610 Roundtrip, found 9 hours ago
$610
Roundtrip
found 9 hours ago
Select British Airways flight, departing Wed, Aug 12 from Harry Reid Intl. to Heathrow, returning Wed, Aug 26, priced at $610 found 9 hours ago

Frequently asked questions

What route does flight number BA274 take?
BA274 jets between McCarran Intl. Airport (LAS) and LHR and is a direct flight. This service generally takes 10 hours and 15 minutes.
How often is BA274 on time?
People flying on British Airways flight number BA274 should be aware that 70% of these flights take off on schedule. If you encounter a delay, the typical wait time is approximately 36 minutes. This service has a 0.45-star rating.
What terminal does BA274 fly out of?
Flights between Las Vegas, NV Airport (LAS-McCarran Intl.) and London Airport (LHR-Heathrow) are served by BA274, and passengers who travel on this route usually take off from Terminal 3.
What kind of plane is on flight number BA274?
You're likely to find yourself traveling aboard a Boeing 777 if you're on flight number BA274. This flight almost always leaves from McCarran Intl. Airport (LAS) and touches down at London Airport (LHR-Heathrow).
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your BA274 flight with Travelocity, please visit our Customer Service Portal.