9 Best UK Car Rental & Transport Affiliate Programs 2026

When UK readers search for “renting a car in Spain” or “train tickets UK-Europe,” our content should answer clearly and supportively. We tell a story of “getting to a music festival via train” or “navigating Paris by rental car.” Also, we’ll cite authoritative facts (e.g. “Trainline sells tickets for 270 rail/coach companies”). This article mentions industry growth (e.g. “UK domestic rail travel saw 80 million journeys pre-pandemic”). We avoid “EPC”, instead explain conversions (e.g. “each blogger’s referral typically yields £X”).

UK travelers use a mix of private car rental, ride-hailing, and public transport. Leading affiliate programs here include car hire (Rentalcars.com, Avis, Hertz, Europcar) and transport ticketing (Trainline, National Express) categories. Commissions vary as Rentalcars pays 6%, Avis UK 8%, and Trainline up to 20%. Cookies range from 30 minutes (Kayak) to 30 days (Trainline) or longer. 

Now, let’s move on to our list of the Top UK Car Rental & Transport Affiliate Programs in 2026.

Rentalcars.com: Global Car Hire Aggregator

Rentalcars.com is the world’s largest car hire site (part of Booking Holdings) listing 60,000+ locations. 

• Commission: 6% of booking value. 
• Cookie: 30 days. 
• Pros: Broad coverage (UK & worldwide), trusted brand, easy integration of search widgets. High conversion on searches (“Find UK car rental deals”). 
• Cons: 6% is modest; heavy competition among affiliate sites. 
• Use Case: A UK travel blog about “Driving Tuscany” includes a Rentalcars widget. A reader books a £200/week rental, earning the affiliate ~£12.

Avis UK: Premium Car Rentals

Avis offers diverse vehicles and airport pickup.

• Commission: 8% on qualifying European bookings. 
• Cookie: likely 30d 
• Pros: Attractive 8% rate on EU bookings and frequent promotions (e.g. weekend specials). 
• Cons: Commission for non-European or US rentals may be lower (up to 4%).  
• Use Case: A UK blog on “Family Airport Transfers” highlights Avis holiday rates. Booking a £150 car yields ~£12 commission (8%).

Hertz: Worldwide Rent-a-Car

Hertz is synonymous with car rental globally

• Commission: 3.56-4.28%
• Cookie: 30 days
• Pros: Strong brand recall; often runs affiliate incentives (“bonus offers” to affiliates). Works via Travel Partner programs. 
• Cons: Commission rates vary frequently. The application process can be strict (IATA codes needed). 
• Use Case: A business travel site lists top car services. Readers booking via Hertz links (say £300) earn roughly £15 for the site.

Europcar: Europe’s Top Rentals

Europcar is a dominant player in the UK/EU, with vans and cars.

• Commission: 1.20-1.44% 
• Cookie: 30 days
• Pros: Catering to UK travellers in Europe, often bundling extras (GPS, insurance). 
• Cons: Seasonal market swings 
• Use Case: An expat blog on European road trips links to Europcar’s summer deals, earning commission.

KAYAK: Meta-Search (Dynamic-CPC Payout)

KAYAK isn’t a fixed percentage per sale; affiliates earn a flat rate whenever users click out to a car/hotel provider.

• Commission: Dynamic-CPC model ranging from £0.07-£0.28 per qualified click.
• Cookie: 30 minutes (click tracking)
• Pros: No inventory risk and quick payouts (one of the highest CPC rates in travel). 
• Cons: Strict conditions such as multiple clicks per session cap. This works best on high-traffic sites with frequent searchers. 
• Use Case: A flight deals site embeds KAYAK search: when a user clicks a flight or car deal via KAYAK and moves on, the site earns up to £0.28 per click-out. Over time, this builds passive income on every user search.

Trainline: UK/Europe Train & Coach Tickets

Trainline sells train and coach tickets across the UK and Europe.

• Commission: Up to 20% of tickets (CPA). 
• Cookie: 30 days. 
• Pros: Industry-leading payout and 30-day cookie, thanks to high ticket prices. It’s now Europe’s #1 train platform. Also offers CPA or hybrid deals with partners. 
• Cons: Content publishers and high-quality sites preferred, but Cuelinks can help you crack!
• Use Case: A UK travel blog shows “Easy train itineraries to Paris”. When a reader books £120 eurostar tickets, the affiliate earns up to £24 (20%).

National Express: UK Coach Network

National Express is the nation’s largest coach operator.

• Commission: Up to 4% of booking. 
• Cookie: N/A
• Pros: 4% on all UK routes and some European services, plus a strong UK brand. 
• Cons: Only a 4% payout and, as of now, affiliate sign-up is paused, requiring checking back for launch.
• Use Case: A content site about “Cheap UK Travel” highlights coach travel. Once the affiliate program opens, every £50 ticket booked nets £2.

Expedia UK Affiliate Program: Flights & Cars

Expedia’s affiliate API covers flights, cars, and hotels.

• Commission: 2-3% of flight/car bookings
• Cookie: 7 days.
• Pros: Trusted by UK consumers, cross-selling (hotels to flights, vice versa). 
• Cons: Complex integration; commission is small per sale. 
• Use Case: A tour operator’s site links to Expedia flights. They earn a few pounds on each £200 flight booking, supplementing their margins.

Top Programs Comparison

Program	Commission Structure	Key Pros	Key Cons
Rentalcars	6% of booking value	Largest global rental inventory, strong brand	Low percentage
Avis UK	8% on bookings (European destinations)	Higher commission (8% UK/EU), trusted brand	Commission 4% on other regions
Hertz UK	3.56-4.28%	Well-known brand, global coverage	Commission rate fluctuation
Europcar	1.20-1.44%	Major EU presence, family options	Seasonal variations
KAYAK	Dynamic-CPC based: up to £0.28 per qualified click	No inventory risk, high brand awareness	complex rules
Trainline	Up to 20% of ticket (CPA)	High commission, covers UK/EU rail & coach	Tougher approval process
National Express	Up to 4% of booking	4% on UK coach tickets, UK-wide brand	Low commission rate
Booking.com	2% of booking	Integrated with hotels/flights, high traffic	Lower commission
Expedia United Kingdom	1.12-3% (cars)	Big OTA, many ancillaries	Commission varies by product

Note: All affiliate programs mentioned above are made available on the Cuelinks affiliate marketing platform. Some are Dynamic-CPC based so the commission rates you see above are on an average. 

Conclusion

These are high-demand, recurring services with regular bookings. However, competition is stiff, and some models (Kayak’s per-click payouts) require volume. Trainline’s 20% commission is a goldmine if you write about European train travel. Benefit-driven angles include cost-saving tips (“cheapest hire car deals,” “family train discounts”) and stories like “avoiding airport taxi surcharges.” We recommend affiliates to think long-term (e.g. including booking API for real-time train search widgets) for their UK audience.