diff --git a/agenda/trip.py b/agenda/trip.py
index b0c50cf..cbb72fc 100644
--- a/agenda/trip.py
+++ b/agenda/trip.py
@@ -93,7 +93,6 @@ def load_flight_bookings(data_dir: str) -> list[StrDict]:
     """Load flight bookings."""
     bookings = load_travel("flight", "flights", data_dir)
     airlines = yaml.safe_load(open(os.path.join(data_dir, "airlines.yaml")))
-    iata = {a["iata"]: a["name"] for a in airlines}
     airports = travel.parse_yaml("airports", data_dir)
     for booking in bookings:
         for flight in booking["flights"]:
@@ -102,7 +101,7 @@ def load_flight_bookings(data_dir: str) -> list[StrDict]:
             if flight["to"] in airports:
                 flight["to_airport"] = airports[flight["to"]]
             if "airline" in flight:
-                flight["airline_name"] = iata.get(flight["airline"], "[unknown]")
+                flight["airline_name"] = airlines.get(flight["airline"], "[unknown]")
 
             flight["distance"] = travel.flight_distance(flight)
     return bookings
diff --git a/validate_yaml.py b/validate_yaml.py
index ec34a52..d23fd0e 100755
--- a/validate_yaml.py
+++ b/validate_yaml.py
@@ -13,86 +13,43 @@ import agenda.trip
 import agenda.types
 
 config = __import__("config.default", fromlist=[""])
+
 data_dir = config.PERSONAL_DATA
 
+trip_list = agenda.trip.build_trip_list(data_dir)
+print(len(trip_list), "trips")
 
-def check_trips() -> None:
-    """Check trips."""
-    trip_list = agenda.trip.build_trip_list(data_dir)
-    print(len(trip_list), "trips")
+coords, routes = agenda.trip.get_coordinates_and_routes(trip_list, data_dir)
+print(len(coords), "coords")
+print(len(routes), "routes")
 
-    coords, routes = agenda.trip.get_coordinates_and_routes(trip_list, data_dir)
-    print(len(coords), "coords")
-    print(len(routes), "routes")
+flights = agenda.travel.parse_yaml("flights", data_dir)
+print(len(flights), "flights")
+
+trains = agenda.travel.parse_yaml("trains", data_dir)
+print(len(trains), "trains")
+
+conferences = agenda.conference.get_list(os.path.join(data_dir, "conferences.yaml"))
+print(len(conferences), "conferences")
+
+today = date.today()
+last_year = today - timedelta(days=365)
+next_year = today + timedelta(days=2 * 365)
+
+events = agenda.events_yaml.read(data_dir, last_year, next_year)
+print(len(events), "events")
+
+airports = typing.cast(
+    dict[str, agenda.types.StrDict], agenda.travel.parse_yaml("airports", data_dir)
+)
+print(len(airports), "airports")
+for airport in airports.values():
+    assert "country" in airport
+    assert agenda.get_country(airport["country"])
 
 
-def check_flights() -> None:
-    """Check flights."""
-    flights = agenda.travel.parse_yaml("flights", data_dir)
-    print(len(flights), "flights")
-
-
-def check_trains() -> None:
-    """Check trains."""
-    trains = agenda.travel.parse_yaml("trains", data_dir)
-    print(len(trains), "trains")
-
-
-def check_conferences() -> None:
-    """Check conferences."""
-    conferences = agenda.conference.get_list(os.path.join(data_dir, "conferences.yaml"))
-    print(len(conferences), "conferences")
-
-
-def check_events() -> None:
-    """Check events."""
-    today = date.today()
-    last_year = today - timedelta(days=365)
-    next_year = today + timedelta(days=2 * 365)
-
-    events = agenda.events_yaml.read(data_dir, last_year, next_year)
-    print(len(events), "events")
-
-
-def check_airports() -> None:
-    """Check airports."""
-    airports = typing.cast(
-        dict[str, agenda.types.StrDict], agenda.travel.parse_yaml("airports", data_dir)
-    )
-    print(len(airports), "airports")
-    for airport in airports.values():
-        assert "country" in airport
-        assert agenda.get_country(airport["country"])
-
-
-def check_stations() -> None:
-    """Check stations."""
-    stations = agenda.travel.parse_yaml("stations", data_dir)
-    print(len(stations), "stations")
-    for station in stations:
-        assert "country" in station
-        assert agenda.get_country(station["country"])
-
-
-def check_airlines() -> None:
-    """Check airlines."""
-    airlines = agenda.travel.parse_yaml("airlines", data_dir)
-    print(len(airlines), "airlines")
-    for airline in airlines:
-        assert airline.keys() == {"icao", "iata", "name"}
-
-
-def check() -> None:
-    """Validate personal data YAML files."""
-    check_trips()
-    check_flights()
-    check_trains()
-    check_conferences()
-    check_events()
-    check_airports()
-    check_stations()
-    check_airlines()
-
-
-if __name__ == "__main__":
-    check()
+stations = agenda.travel.parse_yaml("stations", data_dir)
+print(len(stations), "stations")
+for station in stations:
+    assert "country" in station
+    assert agenda.get_country(station["country"])