It's been over 15 years since my wife and I travelled overseas and an opportunity has opened up where we will be able to take three weeks off in April to visit family in London with our kids who are both under 12. We will also look to go to Ireland, Scotland, and Paris.
Given a lot has changed since we last planned a big trip and I'm not very good with how flyer and hotel programs work, I'd appreciate any tips that will help us maximise savings on flights and accommodation or perhaps you have a tip that will allow us to accumulate points, or unlock benefits or upgrades during the trip, or a favourite stopover to break up the trip.
Your question is super broad, but let me see if I can start.
Use Google flights or a similar site with your dates to scout out possible flights. I’d suggest not being fixed to flying in and out of London - often Dublin or Paris are cheaper.
The big savings are often for terrible connections/lay overs, so if you can get flights in April under, say $1800 with a reasonable transit time and reputable airline, I’d say that is close to the best you will get.
I’d personally use rail to get around UK and Paris, tickets are cheapest booked ahead.
Ryanair or similar between Ireland and UK or Paris.
Unless you have a special credit card, it is hard to get lounge access, but maybe you have a platinum or black card that is worth seeing if it includes any features like that?
My other advice is pretty generic too, just have a couple of credit/debit cards, ideally with no international fees. Compare accommodation ruthlessly, the different sites have lots of specials that can often save 15% compared to usual.
I have gone off AirBNB because they are so poor at dealing with cancellations, but you might feel differently.
If you want specific advice, share the things you want to do, budget expectations ($300 a night, $1000 a night, 5 star dining etc.)