Hold/cargo or checked-pet weight limits vary by route and aircraft
Saudia
Saudia is the main Saudi flag carrier and a direct operator on several UK to Saudi Arabia routes, including services into Riyadh, Jeddah and Dammam. For dog owners, the important distinction is that Saudia's published pet guidance treats dogs as hold or cargo-hold animals rather than normal passenger-cabin pets. Cats and small birds may be accepted in the cabin on eligible flights, but dogs should be planned around cargo-hold handling, import permits and the Saudi arrival rules.

Book early and confirm aircraft acceptance.
Under-seat dimensions can vary by aircraft.
Fees can change by region and currency.
Confirm the dog booking directly with Saudia.
Ask for written confirmation of the exact route, aircraft, dog weight, breed, carrier or crate size, fee and documents before paying.
Booking tip
If Saudia appears as the direct operator for your route, contact Saudia before paying for the passenger ticket and ask for written confirmation of dog acceptance on the exact flight, aircraft, date, crate size and arrival airport. Saudi Arabia also requires live-animal registration or import permission through the relevant Saudi ministry portal, so treat the airline booking and MEWA paperwork as one combined timeline.
Why it can work
A direct Saudia flight can be a practical starting point for UK to Saudi Arabia because it may reduce transit handoffs. Confirm the dog booking, crate, heat handling and Saudi import documents before you pay.
Restrictions
Do not assume in-cabin dog travel to Saudi Arabia. Saudia's published pet guidance says dogs are transported in the cargo hold, and destination authorities can refuse entry if documents, permits, vaccinations or health certificates are incomplete. Service-dog handling is also restricted and should be checked directly with Saudia for the exact route.
Dog-owner notes
Saudia says household pets require valid health and vaccination certificates, including rabies documents, and all documents required by the destination country. It also says live animals must be registered through the Saudi Ministry of Environment, Water and Agriculture's NAAMA portal before travel. Fees, aircraft acceptance and route handling can change, so verify with Saudia and the Saudi authority before booking.
Final check before paying
Confirm the exact aircraft, route, dog breed, carrier size, temperature rules and destination import law directly with the airline. A country can allow dogs while a specific airline or aircraft refuses them.