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

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British Airways Flight 274 Route Deals From $438

The cheapest prices found with in the last 7 days for return flights were $566 and $438 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 6 - Mon, Aug 11
LAS
Harry Reid Intl.
LHR
Heathrow
$566 Roundtrip, found 2 days ago
$566
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Aug 6 from Harry Reid Intl. to Heathrow, returning Mon, Aug 11, priced at $566 found 2 days ago
Sun, Sep 7 - Tue, Sep 16
LAS
Harry Reid Intl.
LHR
Heathrow
$567 Roundtrip, found 1 hour ago
$567
Roundtrip
found 1 hour ago
Select British Airways flight, departing Sun, Sep 7 from Harry Reid Intl. to Heathrow, returning Tue, Sep 16, priced at $567 found 1 hour ago
Wed, Aug 6 - Mon, Aug 11
LAS
Harry Reid Intl.
LHR
Heathrow
$571 Roundtrip, found 2 days ago
$571
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Aug 6 from Harry Reid Intl. to Heathrow, returning Mon, Aug 11, priced at $571 found 2 days ago
Sun, Sep 7 - Tue, Sep 16
LAS
Harry Reid Intl.
LHR
Heathrow
$577 Roundtrip, found 1 hour ago
$577
Roundtrip
found 1 hour ago
Select British Airways flight, departing Sun, Sep 7 from Harry Reid Intl. to Heathrow, returning Tue, Sep 16, priced at $577 found 1 hour ago
Thu, Oct 16 - Wed, Oct 22
LAS
Harry Reid Intl.
LHR
Heathrow
$621 Roundtrip, just found
$621
Roundtrip
just found
Select British Airways flight, departing Thu, Oct 16 from Harry Reid Intl. to Heathrow, returning Wed, Oct 22, priced at $621 just found

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.