SriLankan Airlines Flight UL503 Deals & Information (2025/2026)

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SriLankan Airlines Flight 503 Route Deals From $543

The cheapest prices found with in the last 7 days for return flights were $1,015 and $543 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jun 16 - Wed, Jun 18
CMB
Bandaranaike Intl.
LHR
Heathrow
$1,015 Roundtrip, found 2 days ago
$1,015
Roundtrip
found 2 days ago
Select SriLankan Airlines flight, departing Mon, Jun 16 from Bandaranaike Intl. to Heathrow, returning Wed, Jun 18, priced at $1,015 found 2 days ago

Frequently asked questions

What route does flight number UL503 take?
UL503 operates from Colombo Airport (CMB-Bandaranaike Intl.) to LHR and flies direct. This trip usually takes 11 hours and 25 minutes.
How often is UL503 on time?
SriLankan Airlines flight number UL503 departs according to schedule on 72% of its journeys. You may want to leave a little space in your itinerary if you are taking this flight. If there is a set back, the average wait time is about 16 minutes. This route has a 2.15-star rating.
What kind of plane is on flight number UL503?
You’ll most likely find yourself traveling aboard the Airbus A330-300 if you’re on flight UL503. This flight almost always jets off from CMB and comes in to land at Heathrow Airport.
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 UL503 flight with Travelocity, please visit our Customer Service Portal.