About H4
HiSky is a Romanian low-cost carrier operating under the H4 code, built around a tight Eastern European network with some serious reach when it wants to. The hub structure tells you everything about its target market: OTP anchors 11 routes, RMO in Chisinau adds another 9, and the carrier has clearly planted a flag for the Romanian and Moldovan diaspora communities spread across Western Europe. Forty-six non-stop routes across 20 airports isn't a massive operation, but it's a focused one. The OTP-JFK route, clocking in at 7,631 km, is the outlier that gets people's attention.
Why fly H4?
The honest answer for most passengers is geography. If you're Romanian or Moldovan and you live in Dublin, Paris, or Frankfurt, HiSky is likely serving a route that the big legacy carriers either abandoned or never bothered with at frequencies that actually work for you. Four routes out of DUB and four into German airports suggest the airline understands exactly where its diaspora customers are. The OTP-JFK route is genuinely interesting — transatlantic service from a carrier this size takes operational commitment that deserves credit. Romania leads the destination count at 18 routes, so if you're routing through OTP, you have real connection options. For the price-sensitive traveler visiting family, that matters more than a Priority Pass lounge.
H4 hub airports
- OTP Bucharest — 11 H4 routes from Romania
- RMO Chisinau — 9 H4 routes from Republic of Moldova
- DUB Dublin — 4 H4 routes from Ireland
- STN London — 2 H4 routes from United Kingdom
- BVA Paris — 2 H4 routes from France
Top destination countries on H4
- Romania — 18 H4 routes
- Republic of Moldova — 9 H4 routes
- Ireland — 4 H4 routes
- Germany — 4 H4 routes
- France — 3 H4 routes
- United Kingdom — 2 H4 routes
- Spain — 1 H4 routes
- Belgium — 1 H4 routes
Tips for booking H4
Book directly and read the fare conditions before you click anything. Low-cost carriers at this scale often have tiered baggage fees that cost more at the airport than online, and HiSky is no exception to the general rule. STN has only 2 routes in the network, so if you're connecting through London, confirm you actually mean Stansted and not Heathrow — that's a different airport, a different part of the city, and a painful mistake. The RMO hub is your friend if you're traveling into Moldova specifically, since 9 routes concentrate real frequency there. HiSky isn't in a major alliance, so don't expect reciprocal miles or lounge benefits from partner carriers.
Frequently asked questions about H4
Where does H4 fly?
H4 operates 46 routes primarily serving Romania, the Republic of Moldova, and Ireland. The airline focuses on connecting these regions with a strong emphasis on Eastern European and Irish destinations.
What is H4's main hub airport?
H4's main hub is Bucharest (OTP), which serves as the primary connection point for the airline's network across Eastern Europe and beyond.
Is H4 a low-cost, legacy, or regional carrier?
H4 operates as a regional carrier, focusing on point-to-point routes across Eastern Europe, Moldova, and Ireland with a manageable network of 46 routes. This regional model allows the airline to serve smaller and medium-sized markets efficiently.
When should I book H4 flights for the best fares?
For H4 flights, booking 4-6 weeks in advance typically offers better rates, though regional routes may have less price volatility than major European carriers. Booking mid-week and flying on off-peak days can also help secure lower fares.
What should I know about H4's baggage and check-in?
Baggage allowances and check-in policies vary by fare type, so it's important to review your specific booking details on H4's website. Online check-in is typically available 24 hours before departure for convenient airport procedures.