Travel · Ecommerce
The UK's leading travel-extras marketplace — airport parking, hotels, lounges, and insurance, with high-volume search and booking across 18 markets.
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Overview
Holiday Extras is the UK's largest travel-extras marketplace, helping over 8 million travellers a year book airport parking, hotels, lounges, transfers, car hire, insurance, and UK breaks. Founded in 1983, it launched the UK's first online airport-parking booking system in 1995 and has been the category leader since.
Key features
- High-volume search and booking for parking, hotels, lounges, transfers, and insurance in one flow
- Free cancellation and a never-beaten-on-price policy across every product
- Affiliate network of 8,000+ travel agents and 4,000 partnership agreements — TUI, easyJet, Virgin Holidays, P&O Cruises
- Group of six businesses including Park-IT (in-house car-park tech) and the Parkspace inventory platform
- Best Add-on Provider 2024 and Best Travel Insurance Provider 2024
Stack & architecture
Backend APIsBooking EngineSearchPaymentsIntegrations18 Markets
Security, payment & location
- Search, availability, pricing, and booking APIs serve high-traffic peaks across 18 markets.
- Front-end work focused on fast search and reliable checkout, consistent across markets and devices.
Code5X's role
We built and maintained the REST APIs behind search, availability, pricing, and booking — integrating supplier and partner inventory, handling payments and booking confirmations, and optimizing queries and caching for high-traffic peaks. On the front end we worked on the customer-facing booking experience, focused on fast search, reliable checkout, and a consistent UI across markets and devices.
Outcome
8M+
travellers / year
40+
years in travel
8,000+
travel-agent partners
