By Dearbail Jordan
Business reporter, BBC News
People look "serious disruption" astatine UK airports implicit Christmas owed to planned strikes by borderline staff, the location caput has warned.
Suella Braverman said radical should "think carefully" astir their plans arsenic "they whitethorn good beryllium impacted".
Staff astatine six airports volition signifier walkouts from 23 December to Boxing Day and from 28 December to New Year's Eve.
The strikes travel astatine 1 of the busiest times for question and coincide with walkouts by bid and obstruction workers.
It is the archetypal Christmas since 2019 that airlines person been capable to run without wide Covid restrictions.
Up to 2 cardinal passengers are expected to get betwixt 23 and 31 December astatine the airports wherever the strikes volition instrumentality place, according to aviation analytics steadfast Cirium.
It said that much than 10,000 flights are scheduled to get astatine Heathrow, London Gatwick, Manchester, Birmingham, Cardiff and Glasgow airports during the period.
Around 1,000 Public and Commercial Services (PCS) national members - including radical who enactment successful passport power - are taking concern enactment aft the Home Office offered workers a 2% wage emergence alternatively of the 10% they requested.
On Thursday, Ms Braverman said: "If they spell up with those strikes determination volition beryllium undeniable, superior disruption caused to galore thousands of radical who person vacation plans.
"I truly privation to impulse radical who person got plans to question overseas to deliberation cautiously astir their plans due to the fact that they whitethorn good beryllium impacted."
She added: "It's precise regrettable that they person made this determination to perchance onslaught implicit captious times successful the run-up and pursuing Christmas and the New Year."
But Mark Serwotka, wide caput of the PCS, said: "The authorities tin halt these strikes time if it puts wealth connected the table.
"Like truthful galore workers, our members are struggling with the cost-of-living crisis. They are desperate."
The authorities says it volition draught successful subject unit to assistance minimise disruption if the walkouts spell ahead.
But question adept Simon Calder said: "That doesn't marque up for the decades of expertise and acquisition that Border Force unit person truthful you're going to spot queues gathering up.
"Once that happens you could get passengers kept connected planes to debar excessively galore queues successful the arrivals hall. When that happens the planes aren't going retired again afloat of different passengers, delays physique up and that's erstwhile you get diversions and cancellations starting up."
It is expected that if determination is disruption, it volition chiefly impact passengers flying into the UK.
A study successful The Times said that airlines had been advised to cancel up to 30% of flights implicit the 8 days of strikes to forestall disruption astatine airports.
A spokesperson for Airlines UK, which represents the industry, said: "We impulse each parties to enactment connected reaching an statement to debar the request for concern enactment astatine what is specified an important clip of twelvemonth for galore travellers."
One root wrong the aviation manufacture told the BBC that a missive from the Border Force to airports past week said that based connected archetypal modelling, it would beryllium imaginable to run astir 80% of 2019 formation levels during onslaught action.
However, it is understood that immoderate airlines had already expected to tally astir that level of capableness due to the fact that they were not backmost to pre-Covid levels yet.
EasyJet said it was "to early" to accidental what interaction the strikes would person connected its formation schedules.
A spokeswoman said: "As you would expect, we are successful talks with the idiosyncratic airports connected their contingency plans.
"We privation to instrumentality our customers connected their planned trips astatine this important clip of twelvemonth and truthful we impulse each parties to scope an statement arsenic soon arsenic possible."
Jet2 said: "We would similar to fto our customers and manufacture partners cognize that we precise overmuch mean to run our afloat docket of flights passim the festive period, including connected the dates erstwhile onslaught enactment is taking place."
KLM said it was "looking astatine its operation" implicit the Christmas and New Year period, aft being informed by Border Force UK astir the imaginable strikes. It said it does not mean to cancel immoderate flights implicit the play but that the determination would beryllium "constantly reviewed."
A spokesperson for Virgin Atlantic said it volition "continue to enactment intimately with authorities and manufacture to enactment contingency readying and minimise disruption".
They added: "Our customers' journeys implicit the festive play are our precedence and we're focussed connected supporting their question plans, keeping them updated connected immoderate imaginable disruption astatine the border."
Heathrow Airport said its "priority is to guarantee passengers get done the borderline safely and arsenic rapidly arsenic possible".
It added: "We are moving intimately with airlines and Border Force connected mitigation plans for imaginable onslaught enactment by Border Force officers and these plans volition present beryllium implemented for the notified days."
A spokesperson for Gatwick said: "We are disappointed that Border Force unit person decided to instrumentality onslaught enactment astatine this peculiar time.
"We expect that flights volition run arsenic mean and stay successful regular interaction with Border Force astir their mitigation plans. Additional airdrome unit volition besides beryllium made disposable to assistance with rider payment connected onslaught days."
Commenting connected what enactment travellers tin take, Mr Calder said that nether European aerial rider rights rules the hose "has a strict work to get you to your destination arsenic soon arsenic possible, perchance adjacent buying a summons connected different airline".
But helium said: "There conscionable aren't the seats disposable astatine the moment. All you tin bash astatine this signifier is fundamentally anticipation for the best."