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 $764 and $337 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Oct 4 - Wed, Oct 14
LAS
Harry Reid Intl.
LHR
Heathrow
$764 Roundtrip, found 1 hour ago
$764
Roundtrip
found 1 hour ago
Select British Airways flight, departing Sun, Oct 4 from Harry Reid Intl. to Heathrow, returning Wed, Oct 14, priced at $764 found 1 hour ago
Sun, Nov 15 - Tue, Nov 24
LAS
Harry Reid Intl.
LHR
Heathrow
$768 Roundtrip, found 4 hours ago
$768
Roundtrip
found 4 hours ago
Select British Airways flight, departing Sun, Nov 15 from Harry Reid Intl. to Heathrow, returning Tue, Nov 24, priced at $768 found 4 hours ago
Tue, May 4 - Tue, May 11
LAS
Harry Reid Intl.
LHR
Heathrow
$773 Roundtrip, found 12 hours ago
$773
Roundtrip
found 12 hours ago
Select British Airways flight, departing Tue, May 4 from Harry Reid Intl. to Heathrow, returning Tue, May 11, priced at $773 found 12 hours ago
Wed, Nov 4 - Wed, Nov 11
LAS
Harry Reid Intl.
LHR
Heathrow
$774 Roundtrip, just found
$774
Roundtrip
just found
Select British Airways flight, departing Wed, Nov 4 from Harry Reid Intl. to Heathrow, returning Wed, Nov 11, priced at $774 just found
Tue, Dec 1 - Tue, Dec 8
LAS
Harry Reid Intl.
LHR
Heathrow
$775 Roundtrip, found 1 day ago
$775
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Dec 1 from Harry Reid Intl. to Heathrow, returning Tue, Dec 8, priced at $775 found 1 day ago
Wed, Nov 25 - Thu, Dec 3
LAS
Harry Reid Intl.
LHR
Heathrow
$776 Roundtrip, found 3 days ago
$776
Roundtrip
found 3 days ago
Select British Airways flight, departing Wed, Nov 25 from Harry Reid Intl. to Heathrow, returning Thu, Dec 3, priced at $776 found 3 days ago
Tue, May 4 - Tue, May 11
LAS
Harry Reid Intl.
LHR
Heathrow
$778 Roundtrip, found 12 hours ago
$778
Roundtrip
found 12 hours ago
Select British Airways flight, departing Tue, May 4 from Harry Reid Intl. to Heathrow, returning Tue, May 11, priced at $778 found 12 hours ago
Wed, Mar 24 - Tue, Mar 30
LAS
Harry Reid Intl.
LHR
Heathrow
$783 Roundtrip, found 4 hours ago
$783
Roundtrip
found 4 hours ago
Select British Airways flight, departing Wed, Mar 24 from Harry Reid Intl. to Heathrow, returning Tue, Mar 30, priced at $783 found 4 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.