Most travel booking engines connect to more than one supplier: a GDS and low-cost carriers for flights, several bedbanks for hotels, aggregators for buses and transfers. Multiple suppliers improve coverage and prices, but each has its own data format, speed and reliability. This article explains how booking engines manage multiple travel APIs well.
1. A common data model
Each supplier describes flights, hotels or buses differently. The booking engine converts every response into one internal model with standard fields for prices, taxes, rooms, fares and policies. This normalisation lets the website, pricing rules and reports work the same way regardless of supplier.
2. Mapping and deduplication
- Map hotels, airports, cities and airlines to master records.
- Detect the same product from different suppliers.
- Show the best option, or show both when conditions differ.
3. Supplier rules and priority
Not every supplier should be called for every search. Rules decide which suppliers to use by destination, product, channel or customer type. For example, call a regional bedbank only for its strong destinations, or prefer a supplier with better commercial terms when prices are equal.
4. Timeouts and partial results
Suppliers respond at different speeds. Set a timeout for each one and show results progressively, so a slow supplier does not delay the whole page. Late responses can be added when they arrive or used to refresh the cache.
5. Fallbacks
- If a supplier fails during search, show results from the others.
- If a booking fails with one supplier, offer the same product from another where available.
- If a supplier is down, disable it automatically and alert the team.
6. Monitoring
- Response times and error rates per supplier.
- Booking success rates and price-change rates at revalidation.
- Look-to-book ratios against supplier limits.
- Alerts for sudden changes.
7. Cost control
Some suppliers charge for searches or limit look-to-book ratios. Caching, smart supplier selection and avoiding duplicate calls keep costs under control while maintaining good results.
8. Version management
Suppliers update and retire API versions. Track deprecation notices, keep each integration isolated so upgrades do not affect others, and test changes in staging before release.
9. Testing new suppliers safely
Before switching a new supplier on for all customers, run it in a test mode: compare its prices and availability with existing suppliers, then enable it for a small share of traffic or one destination. Watch booking success, price changes and customer feedback before a full rollout. This avoids exposing every customer to an integration that is not ready.
10. Logging for support
When a customer reports a problem, support staff need to see what each supplier returned for that booking. Store request and response logs with sensitive data masked, linked to each search and booking, and keep them long enough to investigate disputes.
In practice: one supplier goes down
During a busy weekend, one hotel supplier started returning errors. Monitoring detected the spike and disabled the supplier automatically, while searches continued with the remaining suppliers. The operations team was alerted and contacted the supplier. Customers saw slightly fewer options but no errors, and the supplier was re-enabled once fixed.
Frequently asked questions
How many suppliers should we connect?
Enough to fill coverage gaps and improve prices in your key markets. Each supplier adds work, so add them for clear reasons.
Can suppliers be switched on and off without code changes?
A well-built engine allows this through admin settings and rules.
Key takeaways
- Normalise and map supplier data into one model.
- Use rules, timeouts and fallbacks to stay fast and reliable.
- Monitor every supplier and manage costs and versions actively.
Connect and manage multiple suppliers with our travel API integration service.
