British Airways Flight 274 Deals & Information (2026/2027)

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British Airways Flight 274 Route Deals From $337

The cheapest prices found with in the last 7 days for return flights were $844 and $337 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jan 10 - Sun, Jan 17
LAS
Harry Reid Intl.
LHR
Heathrow
$844 Roundtrip, found 1 day ago
$844
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Jan 10 from Harry Reid Intl. to Heathrow, returning Sun, Jan 17, priced at $844 found 1 day ago
Tue, Nov 24 - Sun, Nov 29
LAS
Harry Reid Intl.
LHR
Heathrow
$845 Roundtrip, found 13 hours ago
$845
Roundtrip
found 13 hours ago
Select British Airways flight, departing Tue, Nov 24 from Harry Reid Intl. to Heathrow, returning Sun, Nov 29, priced at $845 found 13 hours ago
Tue, Apr 6 - Mon, Apr 12
LAS
Harry Reid Intl.
LHR
Heathrow
$849 Roundtrip, found 9 hours ago
$849
Roundtrip
found 9 hours ago
Select British Airways flight, departing Tue, Apr 6 from Harry Reid Intl. to Heathrow, returning Mon, Apr 12, priced at $849 found 9 hours ago
Tue, Apr 6 - Mon, Apr 12
LAS
Harry Reid Intl.
LHR
Heathrow
$854 Roundtrip, found 9 hours ago
$854
Roundtrip
found 9 hours ago
Select British Airways flight, departing Tue, Apr 6 from Harry Reid Intl. to Heathrow, returning Mon, Apr 12, priced at $854 found 9 hours ago
Tue, Oct 20 - Sat, Oct 31
LAS
Harry Reid Intl.
LHR
Heathrow
$855 Roundtrip, found 3 hours ago
$855
Roundtrip
found 3 hours ago
Select British Airways flight, departing Tue, Oct 20 from Harry Reid Intl. to Heathrow, returning Sat, Oct 31, priced at $855 found 3 hours ago
Wed, Sep 30 - Fri, Oct 9
LAS
Harry Reid Intl.
LHR
Heathrow
$856 Roundtrip, found 7 hours ago
$856
Roundtrip
found 7 hours ago
Select British Airways flight, departing Wed, Sep 30 from Harry Reid Intl. to Heathrow, returning Fri, Oct 9, priced at $856 found 7 hours ago
Tue, Oct 20 - Sat, Oct 31
LAS
Harry Reid Intl.
LHR
Heathrow
$859 Roundtrip, found 3 hours ago
$859
Roundtrip
found 3 hours ago
Select British Airways flight, departing Tue, Oct 20 from Harry Reid Intl. to Heathrow, returning Sat, Oct 31, priced at $859 found 3 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.