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Travel Compass is your travel guide to visiting destinations around the world. It provides you with practical travel information including local information, useful travel phrases, government travel advisory, health advisory and more. Travelcompass.org
"You should not purchase travel tickets before you receive a decision on your visa application – Ireland Embassy”.
"To avoid unnecessary expenses on your part, you will only need to submit the purchased flight ticket or E-ticket when the Embassy informs you that your visa has been granted. However, the Embassy may ask you already at the time of your visa application to submit a copy of your flight booking (flight itinerary). Itinerary Ticket