Free travel tools.
Every number, cited.
Verified carry-on sizes for 75 airlines. 200+ packing lists. 67 city guides. Updated weekly.
As featured in
Forbes
04.2026
Here's Your Summer 2026 Digital Survival Kit For Flight Delays And Cancellations
By Christopher ElliottMentions 2 tools
Airline Carry-On Size by Carrier
All 75 airlines →Southwest Airlines
Carry-on: 24 x 16 x 10 in · No change fees · 2 free checked bags
✓ APR 26Delta Air Lines
Carry-on: 22 x 14 x 9 in · Personal item included
✓ APR 26American Airlines
Carry-on: 22 x 14 x 9 in · Personal item included
✓ APR 26United Airlines
Carry-on: 22 x 14 x 9 in · Personal item included
✓ APR 26JetBlue
Carry-on: 22 x 14 x 9 in · Personal item included
✓ APR 26Spirit Airlines
Carry-on: 22 x 18 x 10 in · Fee required · 1 free personal item
✓ APR 26British Airways
Cabin bag: 56 x 45 x 25 cm · 23 kg max · Plus handbag
✓ APR 26Qantas
Cabin bag: 56 x 36 x 23 cm · 7 kg max · Plus personal item
✓ APR 26Alaska Airlines
Carry-on: 22 x 14 x 9 in · Personal item included
Airline Comparisons
All comparisons →Popular matchups
Is Spirit actually cheaper than United after baggage fees? We compared total cost, on-time rates (they're nearly identical), and the bankruptcy risk.
Southwest dropped free bags and added assigned seating. Is Delta the better domestic pick now? We compared reliability, total cost, and loyalty programs.
United cancels half as often, but American includes a free carry-on on basic economy. Which legacy carrier is the better pick in 2026? We compared the data.
Delta is 8 points ahead on-time. American's miles are worth 40% more. Which advantage matters for your trips? We compared cost, reliability, and loyalty.
Head-to-head on bags, reliability, premium cabin, routes, and the combined Atmos Rewards program. What the merger means for travelers in 2026.
Alaska is nearly 7 points ahead on-time, but JetBlue has 3 extra inches of legroom and free Wi-Fi for everyone. Which matters more for your trip?
Latest comparisons
Aer Lingus offers US preclearance and 26 North American routes. BA has Club Suite and 27 US cities. We compare both IAG siblings for transatlantic flights.
Aeromexico has the world's best on-time record and Clase Premier lie-flat seats. Volaris has 42% domestic market share and $29 fares. We compare both.
AA has Flagship Suite and free Wi-Fi. JAL has 33-inch economy pitch and 2 free checked bags. We compare the oneworld JV partners for transpacific flights.
AA has free Wi-Fi and 350+ destinations. Qatar has Qsuite and 84% on-time performance. We compare the oneworld codeshare partners for long-haul flights.
Destination Guides
All 67 destinations →Tokyo, Japan
A neighborhood-by-neighborhood plan for first-timers who want to eat well, move efficiently, and skip the tourist traps.
Paris, France
A local-tested plan for first-timers who want to eat well, skip the lines, and find the neighborhoods where Paris actually lives.
Barcelona, Spain
A neighborhood-by-neighborhood plan for first-timers who want Gaudi, beaches, and tapas without the tourist-trap markup.
London, United Kingdom
A first-timer's plan that uses London's 20+ free world-class museums as the backbone and fills the gaps with markets, pubs, and parks.
Rome, Italy
How to see the Colosseum, Vatican, and Trastevere without overpaying for anything, plus the booking mistakes that cost most first-timers an extra day of waiting in line.
Bali, Indonesia
Where to base yourself, what to skip, and how to spend $40 to $300 per day without wasting a single one.
Bangkok, Thailand
A 3-day plan for Thailand's capital with real costs in baht, BTS and boat routes, and the neighborhoods where locals actually eat.
Istanbul, Turkey
How to see Hagia Sophia, the Grand Bazaar, and the Asian side without overpaying for taxis, falling for restaurant tricks, or wasting half a day in the wrong neighborhood.
Lisbon, Portugal
A walking-first guide to Lisbon's seven hills, with transit shortcuts, the day trips worth taking, and the tourist traps worth skipping.
Seoul, South Korea
A neighborhood-by-neighborhood plan for first-timers who want to eat well, navigate the subway like a local, and skip the tourist traps.
Amsterdam, Netherlands
A practical 4-day plan that skips the tourist traps and leans into the city the locals actually use.
Berlin, Germany
A neighborhood-by-neighborhood guide to Berlin's best food, Cold War sites, and the city that does not care what time you eat breakfast.
New York City, United States
A local-tested route through Manhattan and Brooklyn that keeps you off the tourist treadmill and under budget.
Dubai, United Arab Emirates
Most tourists spend their entire trip in Downtown and the Marina. The older parts of Dubai, the free attractions, and the affordable food are all within a short metro ride.
Packing Lists
All packing lists →Tokyo, Japan
4 seasons, plug types A/B, visa-free 90 days
Paris, France
4 seasons, plug types C/E, Schengen 90 days
Barcelona, Spain
Mediterranean climate, plug types C/F
London, England
Rain layers essential, plug type G, UK ETA required
Bali, Indonesia
Tropical year-round, plug type C, temple dress codes
Bangkok, Thailand
Hot year-round, plug types A/B/C, visa-free 60 days
Free Travel Tools
All tools →Carry-On Size Checker
Bag-dimension calculator against the carry-on limits of 75 major airlines.
Open toolAirline Baggage Policies
Carry-on, personal item, checked bag, and special-item rules for 75 airlines, sourced from official policy pages.
Open toolAirline Comparisons
Side-by-side head-to-head verdicts on bags, fees, on-time performance, and loyalty programs.
Open toolPackSmart
AI packing list generator with real-time weather data for any destination.
Open toolPacking Lists
Season-by-season packing guides for 60+ destinations, 24 countries, and 26 trip types.
Open toolCruise Line Guides
Fleet, dress code, cabin sizes, ports, and who each cruise line is best for.
Open toolCruise Cabin Size Checker
Interior, balcony, and suite square footage for 56 ships across 7 cruise lines.
Open toolFree Embeddable Widgets
Carry-on size card, bag-fit checker, and checked bag fee calculator. Two-line embed, zero tracking.
Open toolEmbeddable Widgets
All widgets →Carry-On Size Widget
Verified carry-on and personal item dimensions for 75 airlines. Light/dark themes, custom accent color.
Get embed codeBag Fit Checker Widget
Readers enter bag dimensions and instantly see which airlines accept their bag. 5 presets, region filtering.
Get embed codeChecked Bag Fee Widget
Compare checked bag fees across 50 airlines with a built-in calculator. Sorts cheapest first.
Get embed codeTravel Guides
All guides →7 Best Carry-On Size Checkers in 2026 (Free & Tested)
We tested 7 free carry-on size checkers for airline coverage, accuracy, and personal item support. Find out if your bag fits before you get to the gate.
7 Best Checked Bag Fee Calculators in 2026 (Free & Tested)
We tested 7 free checked bag fee calculators for accuracy, airline coverage, and overweight surcharges. Compare fees across 75+ airlines before you book.
8 Best Embeddable Travel Widgets for Bloggers in 2026
We tested 8 embeddable travel widgets for bloggers, from free airline tools to affiliate flight search. Covers privacy, performance, and what readers actually use.
Cruise Comparisons
All comparisons →Carnival vs Celebrity 2026: Budget Fun Ship or Premium Design?
Carnival's lowest entry price and party atmosphere against Celebrity's Edge class design, James Beard-affiliated dining, and Infinite Veranda balconies. A clear split between value and refinement.
Carnival vs Princess 2026: Same Parent Company, Two Different Cruise Experiences
Head-to-head between Carnival's Fun Ship energy and Princess's MedallionClass premium polish. Both owned by Carnival Corporation, but built for different travelers.
Disney vs Celebrity Cruises 2026: Family Theming or Adult Refinement?
Disney's character-driven immersion and rotational dining vs Celebrity's Edge class design, culinary programming, and Infinite Veranda balconies. Two premium lines for opposite audiences.
Disney vs MSC Cruises 2026: Character IP or Global Scale at a Lower Price?
Disney's immersive family theming vs MSC's rapidly growing fleet and international flavor. Disney costs significantly more. MSC delivers bigger ships with the MSC Yacht Club luxury enclave.
Build Logs
All posts →
I tested the 'avoid August' rule against 67 destinations
22 of 23 European cities hit peak crowd in August. But 16 destinations globally sit at low crowd. The dataset, the chart, and the cities that break the rule.
I checked carry-on rules at 75 airlines. The carry-on wasn't the trap.
Across 75 airlines, 24 don't publish personal item dimensions and the 51 that do range threefold in size. The bag you tuck under the seat is where the rules go quiet and the gate agents get strict.
Building a Layover Calculator That Knows Every Terminal at JFK
How I built a connection time calculator covering 70 airports with pairwise terminal transfers, customs buffers, and a five-factor assessment algorithm, then spent half the day fixing dark mode.
Projects
All projects →
Carry-On Embed Widget
Free embeddable carry-on size checker for travel blogs
Griffin Renovation
Contractor website for a Cache Valley renovation company with 32+ years of experience
Joke of the Day
A daily joke in your browser. Clean, fast, actually funny.
Frequently Asked Questions
- Use the carry-on size checker to look up your airline. Each airline page shows verified carry-on, personal item, and checked bag dimensions, weights, and fees. Every number is sourced from the airline's own policy page with a "last verified" date.
- Yes. The airline baggage database, carry-on and personal item size checkers, checked bag fee comparison, packing list generators, airline comparison pages, and destination guides are all free with no signup required.
- Every airline policy on Vientapps is sourced directly from the airline's own published rules, cross-referenced across multiple sources, and cited with a link on the page. Coverage spans 75 carriers including major US, European, Middle Eastern, and Asian airlines.
- Airline pages are re-verified against the airline's official website on a rolling basis. Each page shows a "last verified" date so you can check freshness before your trip. Major policy changes (like fee increases or size rule updates) are usually reflected within a week.
- Yes. The carry-on size widget, bag-fit checker, and checked bag fee calculator are all free to embed. Just copy two lines of HTML. No tracking, no API key, auto-updating data. See the widgets page for embed codes and customization options.
- Caden Sorenson, a senior staff engineer with 15+ years of experience. He runs Vientapps from Logan, Utah as a one-person indie studio. Every tool is built in public with an honest write-up of what shipped, what broke, and what he would do differently.
How do I find the carry-on size limit for my airline?
Are the travel tools free to use?
Where does the airline baggage data come from?
How often is the baggage data updated?
Can I embed these tools on my travel blog?
Who builds Vientapps?
Stay in the loop
New tools, destination guides, and travel updates. Straight to your inbox.