The travel data API for modern applications.
Interline is a comprehensive travel database with 57 API endpoints covering countries, cities, airports, airlines, credit cards, visa requirements, and more. Human-curated, always up to date.
Countries, cities & airports
250+ countries, 15K+ cities, 10K+ airports with common-usage names.
Airlines & flight data
800+ airlines with fleet details, rankings, alliances, and routes.
Visa & entry requirements
Real-time requirements by passport and destination.
250+
Countries & territories
800+
Airlines with rankings
10,000+
Airports & routes
50+
Credit cards & lounge rules
Beyond basic flight data
Interline goes deeper than schedules and routes. Access airline quality metrics, credit card lounge rules, fare class details, and the operational data that powers informed travel decisions.
Rankings based on AirHelp Score — combining on-time performance, claims processing, and customer reviews.
🇺🇿 +998
Uzbekistan
🇻🇦 +379
Holy See Vatican City
🇻🇪 +58
Venezuela, Bolivarian Republic of
🇻🇬 +1284
British Virgin Islands (British)
🇻🇮 +1340
U.S. Virgin Islands (U.S.)
🇻🇳 +84
Viet Nam Vietnam
🇻🇺 +678
Vanuatu
Built around how travel works
Interline treats locations, infrastructure, and rules as they're used in travel, not in administrative records. Place names reflect common usage and cultural considerations, avoiding awkward, outdated, or inconsistent labels that leak into products.
A structured view of the world
Travel-ready datasets covering places, infrastructure, and rules that are organized around real-world usage and modeled together the way they appear in travel products.
Practical details and conventions that affect how travelers operate in a given location.
{ "type": "country", "name": "Sweden", "native_name": { "swe": "Sverige", }, "slug": "sweden", "code": "SE", "flag": "🇸🇪", "classifiers": ["sovereign_state"], "member_of": [ "european-union", "schengen-area", ], "part_of": [ "scandinavia", "europe" ], "languages": ["swe"], "currency": "SEK", "drive_side": "right", "steering_wheel": "left", "calling_code": "+46", "power_socket": "C", "english_proficiency_index": "very_high", "climate_types": ["Cfb", "Dfb", "Dfc", "ET"]}Aviation data that actually connects
Airlines, airports, credit cards, and loyalty programs — linked together the way travelers actually use them.
Airline Intelligence
Quality rankings, fleet details, alliance memberships, and on-time performance for 800+ carriers.
Credit Card Benefits
Lounge access rules, transfer partners, earning rates, and annual credits for every major travel card.
Loyalty Programs
Elite status tiers, point valuations, award charts, and transfer partner ratios across airlines and hotels.
Airport & Route Data
Terminals, lounges, hub relationships, and top routes for 10,000+ airports worldwide.