long haul 
noun
1A long distance (in reference to the transport of goods or passengers): [as modifier]: a long-haul flight...
- Once in my seat I started to behave like a passenger on a long-haul flight.
- She said she had barely heard of the Digital Hub when a passenger on a long-haul flight from the US told her about it.
- On a long-haul flight, flight attendants warm the food for passengers' convenience.
1.1A prolonged and difficult effort or task: implementing the White Paper is likely to be a long haul...
- I have absolutely no doubt it's about my intentions to stay in for the long haul.
- Some hope for rescue, while others take steps to dig in for the long haul.
- They planned to be in for the long haul and more joined them on February 23.
Phrases
be in something for the long haul
over the long haul
- cognitive
- cognitive behavioural therapy
- cognitive dissonance
- cognitive grammar
- postnational
- postnatus
- postneonatal
- post-neuritic
- post-Newtonian
- post-Nicene
- post-nominal
- postnoon
- post-note
- postnotum
- post-nuclear
- postnuptial
- post-nuptially
- post oak
- post-obit
- post-obituary
- postocular
- postoesophageal
- post office
- post-office address
- post-office annuity